A sum of money is shared between Alice, ah and Sita in the ratio 3:2:4. If ah receives $4287.50, how much money do Alice and Sita receive altogether?
Alice --- 3x
a ---- 2x
Sita --- 4x
3x + 2x + 4x = 4287.5
9x = 4287.5
x = 476.39
So Alice + Sita = 5x = 2381.94