The ratio of A to B is 4 : 5 and that of B to C is 2 : 3.

The ratio of A to B is 4 : 5 and that of B to C is 2 : 3. If A equals 800, C equals

A : B = 4 : 5
B : C = 2 : 3
∴ A : B : C = 4 × 2 : 5 × 2 : 5 × 3
= 8 : 10 : 15
If A equals 800, then C equals 1500.