Often with progressives part of each dollar bet goes to seeding the next meter. This way when somebody pops the jackpot the next meter does not start at a small amount but the secondary meter has already grown to a respectable amount. The percentage devoted to the second meter is not necessarily constant but sometimes increases as the primary meter grows. Not that you asked, but in some games like those at Be the Dealer there is a different jackpot for each coinage, and each jackpot is proportional to the coinage. The way I think they do that is what I call a "super meter" that all coinages contribute to. Then each specific coinage gets a share of the super meter in proportion to that coinage divided by the sum of all coinages. For example if they had a progressive video poker game in coinages of 5 cents, 25 cents, $1, and $5 and the super meter had $100,000 then the $1 game meter would have (1/6.75)*100,000 = $14,814.81.