What number should replace the question mark in the series given below? 7, 10, 19, 46, 127, ?

The missing number is 370.

Each step adds a power of 3: 3, 9, 27, 81, 243.

7 + 3 = 10, 10 + 9 = 19, 19 + 27 = 46, 46 + 81 = 127.

The next addition is 243.

127 + 243 = 370.

Method: differences are successive powers of 3.