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The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.
An Introduction to Geometry and the Science of Form: Prepared from the Most ... - Page 130
by Anna Cabot Lowell - 1846 - 161 pages

## Written Arithmetic

George Augustus Walton - 1876 - 358 pages
...as 4 is to 6 ; that is, 2 is the same part of 3 that 4 is of 6. 2 is § of 3, and 4 is § of 6. 367. The first and fourth terms of a proportion are called the extremes, and the second and third are called the means. The first ratio :; called the first couplet, and the...

## Ray's New Practical Arithmetic: A Rev. Ed. of the Practical Arithmetic

Joseph Ray - Arithmetic - 1877 - 350 pages
...„ . д I : : r \ „ I is a compound proportion. 6. Every proportion consists of four terms. 7 .. The first and fourth terms of a proportion are called the extremes. (282) 8. The second and third terms of a proportion are called the means. 9. The last term is said...

William Frothingham Bradbury - Algebra - 1877 - 302 pages
...-.; read, a to b equals c to d, or a is to b as c is to d, or a divided by b equals c divided by d. The first and fourth terms of a proportion are called the extremes, and the second and third the means. 106. In a proportion the product of the means is equal to the product...

## The Packard Commercial Arithmetic

Silas Sadler Packard, Byron Horton - Business mathematics - 1882 - 224 pages
...yd. : 3 yd. : : \$24 : \$12. The expression is also read, " Qyd. is to 3 yd. as \$24 is to \$12." 384. The first and fourth terms of a proportion are called the extremes ; and the second and third, the means. 385. PRINCIPLES. — 1. Tlie product of the means is equal to...

## A Complete Course in Algebra for Academies and High Schools

Webster Wells - Algebra - 1885 - 372 pages
...ma\' be written in either of the forms : а с a:b — с: d, — = — , or a: b : : c: d. bd 290. 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,...

## A Complete Course in Algebra for Academies and High Schools

Webster Wells - Algebra - 1885 - 370 pages
...written in either of the forms : / j а с , , a : b = с : а, - = -, or a : b : : с : a. ba 290. 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...

## A Complete Course in Algebra

Webster Wells - 1885 - 368 pages
...be written in either of the forms : ï -, a с * я a:b = c:d, - = -, or a : b : : с : a. bd 290. 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,...

## A Short Course in Higher Algebra: For Academies, High Schools, and Colleges

Webster Wells - Algebra - 1889 - 584 pages
...antecedent, and the second term the 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,...