What is the dilution ratio of water with LATICRETE® 3642 for using in screeds?

For 50 Kg bag of LATICRETE® 226 powder, the following dilutions for making various thicknesses of screeds:

For 12mm to 25mm thickness of screed, the total liquid required is 5 Litres where the dilution is 1:3 (LATICRETE® 3642 : Water)
For 25mm to 35mm thickness of screed, the total liquid required is 5 Litres where the dilution is 1:4 (LATICRETE® 3642 : water)
For 35mm to 50mm thickness of screed, the total liquid required is 5 Litres where the dilution is 1:5 (LATICRETE® 3642: Water)