If 0.8 : X :: 5: 8, then what is X equal to?

1.28 1.16 1.32 1.24

1.28

0.8 : X :: 5 : 8 ⇒ 5X = 0.8 x 8 ⇒ 5x = 6.4 ⇒ x = 1.28.