Final answer:
The principal amount of the loan is $1925.
Step-by-step explanation:
To determine the principal amount of a loan, we can use the formula:
Principal = Interest / (Interest Rate * Time)
Given that the interest is $231, the interest rate is 4% (0.04), and the loan will be paid off in 3 years, we can substitute these values into the formula:
Principal = $231 / (0.04 * 3)
Calculating this, we find that the principal amount is $1925.