Question

What should come in place of question
mark (?) in the following number series?
200, 240, 300, ?, 600, 1200​

Answer 1

Step-by-step explanation:

400 is the answer.

if we look at the ratio..

240/200= 6/5

300/240= 5/4

x/300= 4/3

600/x= 3/2

1200/600= 2/1

x/300= 4/3

3x= 1200

x= 400