I figured I'd make a topic about this, since it will come up eventually what exactly is needed for a platinum medal. If you get a platinum or gold that helps narrow down the range of what is needed for platinum, post it here. I'll edit the first message to keep it updated. I'm not going off of the challenges alone, since I don't know how accuarate it will be. I know 2 other people for sure have a platinum on Power Throws, but didn't mark it. I'll show an example in the next message.

Maximum pts to still get gold and minimum points to still get platinum:

TENNIS
Returning Balls: Gold=71, Platinum=94
Timing Your Swing: Gold=46, Platinum=50
Target Practice: 40

BASEBALL
Hitting Home Runs: Gold=5647, Platinum=5666
Swing Control: 65
Batting Practice: 30

BOWLING
Picking up Spares: Platinum=20 with 3 misses
Power Throws: 700
Spin Control:20

GOLF
Putting: 10 (no misses)
Hitting the Green: Platinum=55, Gold=71.1
Target Practice: Gold=760, Platinum=800

BOXING
Working the Bag: Platinum=42, Gold=37
Dodging: Gold=83, Platinum=85
Throwing Punches: 70