The answer is five hundred sixty.
First number --- (2a-1)
middle number ---- (2a)
third number -----(2a+1)
2a-1+2a+2a+1=250
6a=250
a=250/6= 125/3
2a=2*(125/3)= 250/3 ---- is not a whole number that is contradicts to what is given, so sum cannot be 250
so
Answer:

Step-by-step explanation:
Here are the pairing:
The first tile should be paired with 4th property
The second tile should be paired with the 1st property
The third tile should be paired with the 3rd property
The fourth tile should be paired with the 2nd property