 | John Henry Walsh, Henry Suzzallo - Arithmetic - 1914 - 524 pages
...Representing XB by x, XA will be x - 36 ; therefore x - 36: x:: 48: 72 or, : : . 2 : 3 (Canceling) Making the product of the extremes equal to the product of the means, the following equation results : 3 x - 108 = 2 x or, x = 108 Ans. 108 rods Test. Compare this result... | |
 | Edward Rutledge Robbins - Geometry, Plane - 1915 - 280 pages
...lines is proved equal to the product of two others, by proving these four lines proportional and making the product of the extremes equal to the product of the means. One line is proved a mean proportional between two others by proving that two triangles containing... | |
 | John Henry Walsh, Henry Suzzallo - Arithmetic - 1915 - 216 pages
...Representing XB by x, XA will be x — 36 ; therefore x - 36 : x : : 48 : 72 or, : : 2 : 3 (Canceling) Making the product of the extremes equal to the product of the means, the following equation results : Sx-I08 = 2x or, x - 108 Am. 108 rods 23. The upper portion of a cone... | |
 | Julius J. H. Hayn - Geometry, Plane - 1925 - 328 pages
...equal angle B, = FE, opposite the angle A, : FB opposite the equal angle C. AF : CF = FE : FB. Taking the product of the extremes equal to the product of the means, we have AF times FB, equals CF times FE. (See 173, 189, 212.) QED 235. // any chord is drawn through... | |
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For, if we have given ab' = a'b, then, dividing by bb', we obtain Corollary. The terms of a proportion may be written In any order which will make the product of the extremes equal to the product of the means. 
