Question

Calcule a quarta proporcional de a) 1/2=7/x b)2/4=3/x

Answer 1

a)

1 7
— = —
2 X

1 . X = 7 . 2
X = 14


b)

2 3
— = —
4 X

2 . X = 3 . 4
2X = 12
X = 12 : 2
X = 6