To convert 1.10225 to 4 decimal places, follow these steps:

1. Identify the digits up to the 4th decimal place: 1.1022.
2. Look at the 5th decimal place (which is 5) to determine whether to round up or down.
- If the digit in the 5th decimal place is 5 or more, round up the 4th decimal place by 1.
- If it's less than 5, leave the 4th decimal place unchanged.

Here, the 5th decimal place is 5, so you round up the 4th decimal place:

- 1.1022 rounds up to 1.1023.

Therefore, the value of 1.10225 rounded to 4 decimal places is 1.1023.

The correct answer is C. 1.1023.