Question

X:Y=2:3,Y:Z=5:7,find X:Y:Z​

Answer 1

Answer:

$x:y = 2:3$

$\frac{x}{y} = \frac{2}{3}$

$x = \frac{2y}{3}$

$y:z = 5:7$

$z = \frac{7y}{5}$

$x:y:z = \frac{2y}{3} :y: \frac{7y}{5}$

$= \frac{2}{3} \times 15:1 \times 15: \frac{7}{5} \times 15$

$= 10:15:21$