 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
 | Sir John Leslie - Geometry, Analytic - 1809 - 542 pages
...13. One antecedent is said to be to ils consequent, as another antecedent to ils consequent. • 14. The first and last terms of a proportion are called the extremes, and the intermediate ones, the means. 15. A ratio is direct, if it follows the order of the terms compared... | |
 | John Davidson, Robert Scott (writing master) - Arithmetic - 1818 - 190 pages
...the fourth'. Proportionals are written thus, 6 : 2 : ; 9 : 3 ; and read thus, 6 is to 2 as 9 to 8. The first and last terms of a proportion are called the Extremes, and the middle terms, the Means : and when four numbers are proportional, " the product of the extremes is... | |
 | Etienne Bézout - Mathematics - 1824 - 238 pages
...(arithmetically) 12 is to 14 ; and in a geometrical proportion, 3 is to 15 as (geometrically) 4 is to 20. 173. The first and last terms of a proportion are called the extremes ; the second and third, or two middle te> ins, are called the means. . As theje are tw.o ratios, and... | |
 | Arithmetic - 1829 - 196 pages
...read, the ratio of 4 to 6 equals the ratio of 10 to 15 ; or more concisely, its to 6 OB 10 to 15. 168. The FIRST and LAST terms of a proportion are called the EXTREMES, and the two middle terms the MEANS. 169. In a proportion there are TWO RATIOS, and conse-. quently two antecedents... | |
 | Thomas H. Palmer - Education - 1840 - 328 pages
...proportions, the two ratios in each being equal ; those in No. 1 being 2, those in No. 2, J, (one third.) The first and last terms of a proportion are called the extremes ; the two middle terms, the means. It is evident, from the mere inspection of any proportion, that... | |
 | Charles Davies - Algebra - 1845 - 382 pages
...antecedent, and the number 10, with which it is compared, a consequent. The first and fourth terms are called the extremes ; and the second and third terms, the means. Let a, b, c, and d, denote four quantities in arithmetical proportion ; and d the difference between... | |
 | James Bates Thomson - Arithmetic - 1846 - 402 pages
...is the last term called in such a case ? What is the difference between proportion and ratio ? 331. The first and last terms of a proportion are called the extremes ; the other two, the means. Oss. Homologous terms are either the two antecedents, or the two consequents.... | |
 | James Bates Thomson - Arithmetic - 1846 - 354 pages
...the last term called in such a case ? What is the difference between proportion and ratio ! 32 1 . The first and last terms of a proportion are called the extremes ; the other two, the means. Oas. Homologous terms are either the two antecedents, or the two consequents.... | |
 | James Bates Thomson - Arithmetic - 1846 - 362 pages
...What is the last term called in such acase? What is the difference between proportion and ratio * 321* The first and last terms of a proportion are called the extremes ; the other two, the means. OBS. Homologous terms are either the two antecedents, or the two consequents.... | |
 | James S. Russell - Arithmetic - 1847 - 340 pages
...forming a proportion are called proportionals, or, the terms of the proportion. The first and fourth terms of a proportion are called the extremes, and the second and third, the means. Also, the first terms, or divisors in ratios, are called the antecedents, and the second... | |
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