To find out how much each person in the group won, first calculate how much money they won in total.
The total prize amount is $4,500, and they won 1/5 of this amount:
\[ \text{Total winnings} = \frac{1}{5} \times 4500 = \frac{4500}{5} = 900 \]
Now, divide this total winnings by the number of people in the group (9) to find out how much each person won:
\[ \text{Winnings per person} = \frac{900}{9} = 100 \]
Therefore, each person in the group won $100.