Proportional means similar in size or amount to something else.
A proportional amount represents your betting stakes, while the amount it corresponds to represents your betting bank.
To use this strategy, you have to bet a percentage of your bankroll and increase the bet value after each winning wager by a similar percentage. Let's say that you have a bankroll of $10,000 and decide to bet 3%. Your initial bet would be $300. When you win the wager, you must add your winnings and calculate 3% of your new bankroll for your next wager. Thus, if you won $300, you would have a total of $10,300. If you calculate 3% of the new amount, you will have to bet $309.
