 | George Albert Wentworth, Thomas Hill - Arithmetic - 1882 - 376 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,... | |
 | Edwin Pliny Seaver, George Augustus Walton - Algebra - 1881 - 304 pages
...proportion, then, may be written ? Compare the ratio 3:2 with the ratio 15:10. Write the proportion. 189. The first and last terms of a proportion are called the extremes, and the second and third are called the means. What are the extremes and what the means in the proportion... | |
 | Benjamin Adams Hathaway - Arithmetic - 1885 - 190 pages
...terms in a proportion are called proportional ? All the terms are called proportional, and the fourth term is said to be a fourth proportional to the other three. 24- When are three numbers in proportion? When the 1st has the same ratio to the 2nd as the 2nd has... | |
 | 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,... | |
 | George Irving Hopkins - Geometry, Plane - 1891 - 208 pages
...other two the means. 277. In a simple proportion, where the terms are all of different values, each term is said to be a fourth proportional to the other three. ,• . '" \ -\ 278. In a simple proportion, where the two means or the two extremes are alike, the... | |
 | Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 344 pages
...is also used in this connection as a sign of equality, the proportion being written a : b : : c : d. The first and last terms of a proportion are called the extremes, and the other terms the means. FUNDAMENTAL PROPERTIES. I. If a : b = c : d, then ad = bc. Proof. 1.... | |
 | Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 346 pages
...is also used in this connection as a sign of equality, the proportion being written a : b : : c : d. The first and last terms of a proportion are called the extremes, and the other terms the means. FUNDAMENTAL PROPERTIES. I. If a : b = c : d, then ad = bc. Proof. 1.... | |
 | George Albert Wentworth - Arithmetic - 1898 - 424 pages
...means, and is read, the ratio of 5 to 3 is equal to the ratio of 15 to 9. 386. Means and Extremes. The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 387. Test of a Proportion. When four numbers are in... | |
 | George Albert Wentworth - Arithmetic - 1898 - 424 pages
...means, and is read, the ratio of 5 to 3 is equal to the ratio of 15 to 9. 386. Means and Extremes. The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 387. Test of a Proportion. When four num hers are in... | |
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The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 
