Question

if a:b = 5:9 and b:c = 4:7, find a:b:c and a:c ?

explain the above with detailed steps.

Answer 1

a : b  = 5 : 9
b : c  =      4 : 7

Observe that the figures against b are 9 and 4 .
Find LCM of 9 and 4. This is 36.

Now make figures in both ratios such that figure against b is 36.
Therefore a : b = (Multiply by 4) 5x4 : 9x4 = 20 : 36
                 B : c = (multiply by 9) 4x9 : 7x9 =        36 : 63

When figure against b is made same (as b =36 above),
Ratio a : b : c = 20 : 36 : 63

and a :c = 20 : 63

Answer 2

Answer:

The answer of this question