Question

If $a:b=3:7$ and $b:c=3:4$ then find $a:b:c$.
If $a:b=3:5$ and $b:c=2:3$ then find $a:b:c$

Answer 1

Part $\left(A\right)$

$a:b=3:7$ and $b:c=3:4$

$a:b=9:21$ and $b:c=21:28$

So,

$a:b:c=9:21:28$

Part $\left(B\right)$

$a:b=3:5$ and $b:c=2:3$

$a:b=6:10$ and $b:c=10:15$

So,

$a:b:c=6:10:25$

Hence, this is the answer.