 | James William Nicholson - Algebra - 1909 - 332 pages
...equation whose members are ratios. Thus, о : 6 = с : d, or - = li a is a proportion, which is read, the ratio of a to b is equal to the ratio of с to d. The same proportion is sometimes written a:b::c:>l, which is read, a is to 6 as с is to d.... | |
 | William Herschel Bruce, Claude Carr Cody (Jr.) - Geometry, Modern - 1910 - 286 pages
...: ac — = — ; a:b::c:d; a : 0 = c : a. 6 d This proportion is read "a is to 6 as c is to d"; or "the ratio of a to b is equal to the ratio of c to d." 312. The four quantities, a, 6, c, and d, are called the terms of the proportion. 313. The first and... | |
 | William James Milne - Algebra - 1911 - 378 pages
...extremities of the lines that form the sign of equality. The proportion a:b = c:d, or a:b::c:d, is read, ' the ratio of a to b is equal to the ratio of с to d,' or ' о is to b as с is to d.' 389. In a proportion, the first and fourth terms are called... | |
 | Webster Wells, Walter Wilson Hart - Algebra - 1912 - 344 pages
...parts which are as 5 : 3 : 2. 212. A Proportion is a statement that two ratios are equal. The statement that the ratio of a to b is equal to the ratio of с to d is written either л с i , — = -, or a : о = с : a. о а This proportion is read " a... | |
 | Webster Wells, Walter Wilson Hart - Algebra - 1913 - 362 pages
...which are as о : 3 : 2. 184. A Proportion is a statement that two ratios are equal. The statement that the ratio of a to b is equal to the ratio of с to d is written either а с , ., — = -, or а: b = c: a. bd This proportion is read " a is to... | |
 | Webster Wells, Walter Wilson Hart - Algebra - 1913 - 360 pages
...which are as 5 : 3 : 2. 184. A Proportion is a statement that two ratios are equal. Т he statement that the ratio of a to b is equal to the ratio or с to d is written either ae TI — = -, or a: o = c: a. о a This proportion is read " a is to... | |
 | William James Milne - Algebra - 1914 - 514 pages
...lines that form the sign of equality. The proportion a : & = c : d, or a : b : : c : d, is read, ' the ratio of a to b is equal to the ratio of c to d,' or 'a is to 6 as c is to d.' 473. In a proportion, the first and fourth terms are called the extremes,... | |
 | George Hervey Hallett, Robert Franklin Anderson - Algebra - 1917 - 432 pages
...called bd the terms of the proportion. Note. A proportion is often written я : h = с. : d ; read, the ratio of a to b is equal to the ratio of с to d. An old form and one less frequently used is a : ft : : с : d. 172. Extremes and means. The... | |
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To express that the ratio of A to B is equal to the ratio of C to D, we write the quantities thus : A : B : : C : D; and read, A is to B as C to D. 
