Given that a:b=8:5 b:c=3:4 find the ratio a:b:c

A:b = 8:5 b:c = 3:4

since both sides have b. make b the same. multiply the left by the right side b value of 3 and multiply the right by the left side b value of 5.

3 (a:b) and 5 (b:c)

3 (8:5) and 5 (3:4)

24:15 15:20

now that both sides have the same b value

a:b:c = 24:15:20