Let the marked price be \( x \).
Selling price after 10% discount = \( 0.9x \).
To gain 25%, the selling price should be \( 1.25 \times 360 = 450 \).
Thus, \( 0.9x = 450 \).
Solving for \( x \):
\[
x = \frac{450}{0.9} = 500
\]
Thus, the required marked price is ₹500.