If (3x − 2y) : (3x + 2y) = 4 : 5 then what is (x + y) : (x − y)?

The corresponding sides of two similar triangles are ____.

Find the mean proportion of xy² and xz²

State True or False: The compound ratio of 2ab : c², bc : a² and ca : 2b2 is 1 : 1.

Find the third proportional of 5, 10.

If = 1, then find the value of .

If a : b = b : c, prove that = 1

If A : B = 2 : 3, B : C = 5 : 8, C : D = 6 : 7, then A : D = (a) 2 : 7 (b) 7 : 2 (c) 5 : 8 (d) 5 : 14

If a, b, c are in continued proportion, then prove that

Find the ratio of length of radius and perimeter of a circle

If = , then find the value of

If (b + c - a)x = (c + a - b)y = (a + b - c)z = 2, then prove that (1/x + 1/y)(1/y + 1/z)(1/z + 1/x) = abc.