Not really. The receiver will get the money in which they have opted for. So the conversion will happen. But I doubt PP is actually using the current USD-->INR conversion rates. They are slightly higher.
On 22nd April the rate was: 1 USD = 54.0514 INR (as per:
this site). As per PP's calculations: 280.35 / 5 = 56.07 (or 1 INR = 0.0178). So some how they charged higher.