I've never started any tree from a cutting but would like to try....in particular there is a pear tree in my Dad's field that was my grandmother's....no idea how old that tree is but I ate pears off of it as a kid and this year it's loaded....I would absolutely love to get some cuttings started.
I mentioned trying to start a pear tree from seed on here and was told it was not going to work and that I should use cuttings and I needed to buy the growth hormone powder or gel to dip the cutting in before potting.....if memory is correct I was told to plant 20 cuttings if I wanted 5 trees to make it....not easy but doable.
I've had a little luck getting pears to grow from clippings. None are producing fruit yet but the oldest stayed alive & have grown for 3yrs, so I
think it worked out??? I wasn't even particularly trying with them, either. I was pruning a tree and took the cuts, beveled the end, and stuck them in the ground out around my field. Didn't get anywhere near the 1:4 ratio you noted but I didn't use hormone and didn't use clean clippers. When pruning I don't throw clippings away. I just stick them in the ground. So far I've had a few apples, maples, plums, and pears take off. Heck, I even clipped some red osier dogwood while up in WI last winter, potted them in peat moss on the front porch, and they've grown 24" over spring & summer. Gona transplant them to my OH property. Should be a good creek liner.