Okay 1 bite 2 claws, I want to take Vital Strike, do i deal 3 times the damage of one of my natural weapons?
No you deal normal damage for one attack +1 weapon dice of damage.
So if you have 2 claws at a 1d4 and one bite at 1d6 assuming all are primary and you have a 14 str you could either do 2d4+3 or 2d6+3 with vital strike.
Vital strike is not that good with natural weapons because the dice are so low. You may want to look at improved natural weapon instead. Take this on the claws and now they do 1d6 instead of 1d4. This would not only increase the damage on a single attack it would increase it when you can make a full attack.