What number must be added to each of the numbers 4, 6, 8 and 11 so that the resulting four numbers are in proportion?

Using componendo and dividendo, solve for x: = 3

(x + 3), 1, (3x − 7) and −5 are in proportion. The value of x is : (a) −1 (b) 1 (c) −5 (d) 5

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

If x = , a ≠ b, (a) Find: (b) Using properties of proportion, find:

The following table shows the distance travelled by a train moving with uniform speed: Distance (m) 60 90 y Time (s) 2 x 5 The values of x and y are: (a) x = 4, y = 150 (b) x = 3, y = 100 (c) x = 4, y = 100 (d) x = 3, y = 150

The corresponding sides of two similar triangles are ____.

Find the third proportional of 5, 10.

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

Using properties of proportion, find x: , x ≠ 0.

If : (a) Find . (b) Hence, using properties of proportion, find a : b.

Find the mean proportion of xy² and xz²