I am a 3 digit number. The digit in the hundreds place is 4 times the digit in the ten place. The digit in the ones place is the sum of the digit in the hundreds and ten places. If the digit in the hundreds place is 4, what am I?

"the digit in the hundreds place is 4"

---> 4xx
"The digit in the hundreds place is 4 times the digit in the ten place"
---> 41x
"The digit in the ones place is the sum of the digit in the hundreds and ten places"

---> 415