Question

(e) If 25, z, z, 49 are in proportion, then find the value of z.​

Answer 1

$\frac{25}{z} = \frac{z}{49} \\ \\ 25 \times 49 = {z}^{2} \\ {z}^{2} = 1225 \\ z = \sqrt{1225} \\ z = 35$