What is the ratio of the mean proportional between 1.2 and 10.8 to the third proportional to 0.2 and 1.2?

1 : 3 1 : 2 2 : 1 3 : 1

1 : 2

Mean Proportional = \(\sqrt {1.2 × 10.8 }\) ⇒ MP = 0.36 ⇒ The third proportional x, ⇒ 0.2x = 1.2 x 1.2  ⇒ 0.2x = 1.44 ⇒ x = 0.72 ⇒ MP : TP = 0.36 : 0.72 = 1 : 2.