Possibly, even though Jak X follows Jak 3, Jak X is sort of a single story. It isn't really connected to the plot of the trilogy is it? The only link is Krew's death. You have to have Jak 1, 2 and 3 for the story to make complete sence, but you don't need Jak X really. So it's possible to follow up on Jak 3, as long Jak's age is still affected by the time in Jak X.