Hmmmm?
Remembering my high school physics class I believe you add your compound systems not multiply. I think your system is about 10 or 11 to 1 and not 45 to 1. What was your input pull? Let’s just guess 100lbs. In a 10-1 system you’d be pulling at about 1000lbs and not 4500lbs as first stated judging by the way the tree came out of the ground my guess is you were pulling at the lower number? IMHO. it’s been a long time since high school physics class.