If the ratio x:y = 3:5 and y:z = 4:7, find the ratio x:y:z

Explanation

x : y = 3.5, y : z = 4 : 7

x = 3 x 4 = 12

y = 5 x 4 = 20

y = 4 x 5 = 20

z = 7 x 5 = 35

then x : y : z = 12 : 20 : 35