Ted Cruz currently has 226 delegates committed to him. This is 33% of the 688 already allocated in the contests to date.
Cruz still needs 1011 delegates to get to 1237, which is 57% of the 1784 delegates still up for grabs, not 33%.
Ted Cruz is going to ramp up his support by 24 points in all the future contests? I don't think so. Improving his wins by 73% is not in the cards.
Ted Cruz needs to think about an eventual alliance, or hope for a brokered convention.