Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.

375 : 592 :: 423 : 640 :: 198 : ?

415

The relation between two consecutive term is :

The difference between first and the second term is 217.

Let's apply the pattern on the given series:

375 : 592

592 - 375 = 217

 & 423 : 640

640 - 423 = 217

Similarly ,

198 : ?

 ? - 198 = 217

 ? = 217 +198

 ? = 415

415 is correct answer .