Question

If X: W = 3:8, X: Y = 4:9 and
Z: Y = 5:7, then Z:W=​

Answer 1

Answer:

frstly we will compare x:yand z:y so,

x:y=z:y

4:9=5:7

multiply by 7 on LHS and multiply by 9 on RHS we get

4*7:9*7=5*9:7*9

28:63=45:63

so we will get x:z=28:45

now we have to compare x:z and x:w so,

x:z=x:w

28:45=3:8

multiply by 3 on LHS and multiply by 28 on RHS we get ,

28*3:45*3=3*28:8*28

84:135=84:224

so we will get

z:w =135:224