Aaron works 3 1/2 hours every Saturday at a rate of $7.25 per hour. He is paid every four weeks. If his boss gives him a $1.00 raise, how much will Aaron be paid in his next paycheck?

Aaron currently earns 3.5 * $7.25 = $<<3.5*7.25=25.375>>25.375 every Saturday.

This means that every 4 weeks, Aaron earns $25.375 * 4 = $<<25.375*4=101.50>>101.50.
With a raise, Aaron's new pay rate is $7.25 + $1.00 = $<<7.25+1=8.25>>8.25 per hour.
Working for 3.5 hours at this rate each Saturday, he will earn 3.5 * $8.25 = $<<3.5*8.25=28.875>>28.875 per Saturday.
This means that every 4 weeks, Aaron will now earn $28.875 * 4 = $<<28.875*4=115.50>>115.50.
Therefore, Aaron will be paid $115.50 in his next paycheck. Answer: \boxed{115.50}.