Fowler, Inc., just paid a dividend of $2.55 per share on its stock. The dividends are expected to grow at a constant rate of 3.9 percent per year, indefinitely. If investors require a return of 10.4 percent on this stock, what is the current price? What will the price be in three years? In 15 years?

Why do we calculate expected dividends in 4 years and not three years when finding the price in three years?