| Webster Wells - Geometry, Plane - 1908 - 208 pages
...POLYGONS DEFINITIONS 210. A Proportion is a statement that two ratios are equal. 211. The statement that **the ratio of a to b is equal to the ratio of c to d** is written a_£ b~d 212. In the proportion - = -, we call a the first term, b the 0 Cd second term,... | |
| George Albert Wentworth - Algebra - 1908 - 246 pages
...formed by two equal ratios a : b and с ; d may Ъе written in three ways : (1) a : b = с : d (read, **the ratio of a to b is equal to the ratio of** о to d). (2) a : b : : с : d (read, a is to b as с is to d), a and d are the extremes, b and с... | |
| William James Milne - Algebra - 1908 - 476 pages
...lines that form the sign of equality. The proportion a : b = с : d, or a : b : : с : d, is read, ' **the ratio of a to b is equal to the ratio of** с to d,' or 'a is to b as с is to d.' 473. In a proportion, the first and fourth terms are called... | |
| 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 - 380 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
...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 r,atio of** с to d is written either а с , , — = -, 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... | |
| 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,... | |
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