OK, I think you now need this second page from Ray.
Fertilizer Mixing Calculators
On this you can enter the N number from your fertiliser (you will want to enter 1/4 of the N number because you now have a 1/4 concentration). The number of times you water per month and how many times you fertilise per month. You can also enter a target concentration but I would advise going with the default of 125 that Ray recommends.
It will then tell you the concentration to mix it at per watering. As it's based on how often you water per month it should sort everything out for you.