 The first and fourth terms of a proportion are called the extremes; and the second and third terms the means. Thus, in the • proportion a : b = с : d, a and d are the extremes, and b and с the means.  Progressive Arithmetic: Third Book - Page 290by William James Milne - 1906 - 366 pagesFull view - About this book
 | George Albert Wentworth - Arithmetic - 1886 - 392 pages
...or 6 : 3 : : 18 : 9, means, and is read, the ratio of 6 to 3 is equal to the ratio of 18 to 9. 253. The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 254. Test of a proportion. When four numbers are proportionals,... | |
 | George Albert Wentworth - Arithmetic - 1888 - 392 pages
...15 : 9 (read 5 to 3 = 15 to 9), may be written 5 : 3 : : 15 : 9 (read 5 is to 3 as 15 is to 9). 334. The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 335. Test of a proportion. When four numbers are proportionals,... | |
 | Webster Wells - Algebra - 1889 - 584 pages
...consequent. Thus in the ratio a : b, a is the antecedent, and .b is the consequent. The first and fourth terms of a proportion are called the extremes, and the second and third terms the means. Thus in the proportion a : b = с : d, a and d are the extremes, and b and с the means. 307. In a... | |
 | Charles Austin Hobbs - Arithmetic - 1889 - 370 pages
...15 ; 4 : 6 = 10 : 15 is read the ratio of 4 to 6 equals the ratio of 10 to 15. The first and fourth terms of a proportion are called the extremes, and the second and third terms are called the means. Three numbers are said to be in proportion when the ratio of the first to the... | |
 | John Bernard Clarke - Algebra - 1889 - 566 pages
...mean (Arithmetical, Harmonic, or Geometrical,) between the other two. In general, the first and fourth terms of. a proportion are called the extremes, and the second and third the means, the antecedents and consequents of the ratios preserving their names in the proportion.... | |
 | Charles Austin Hobbs - Arithmetic - 1889 - 366 pages
...: 6 = 10 : 15 is read the ratio of 4 to 6 equals the ratio of 10 to 15. The first and fourth tarnis of a proportion are called the extremes, and the second and third terms are called the means. Three numbers are said to be in proportion when the ratio of the first to the... | |
 | Webster Wells - Algebra - 1890 - 560 pages
...consequent. Thus, in the ratio a:b, a is the antecedent, and b is the consequent. The first and fourth terms of a proportion are called the extremes, and the second and third terms the means. Thus, in the proportion a : b = c : d, a and d are the extremes, and b and c the means. 379. In a proportion... | |
 | Webster Wells - Arithmetic - 1893 - 360 pages
...proportion, which may be written in the forms 3:5 = 6:10, f = ^ or3:5::6:10. 265. The first and fourth terms of a proportion are called the extremes, and the second and third terms the means. Thus, in the proportion 3 : 5 = 6 :10, 3 and 10 are the extremes, and 5 and 6 the means. 266. In a... | |
 | George Albert Wentworth - Arithmetic - 1893 - 376 pages
...: 3 : : 18 : 9, means, and is read, the ratio of 6 to 3 is equal to the ratio of 18 to 9. 253. Tine first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 254. Test of a proportion. When four numbers are proportionals,... | |
 | Webster Wells - Geometry - 1894 - 256 pages
...may be written in either of the forms a : b = c : d, or - = -. bd 7 T ac 228. The first and fourth terms of a proportion are called the extremes, and the second and third the means. The first and third terms are called the antecedents, and the second and fourth the consequents.... | |
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