Content
- Transformation 1
- 1st : 3rd = 2nd : 4th |-> 4th : 2nd = 3rd : 1st
- Transformation 2
- If four quantities are in proportion, they are in proportion also by inversion
- Transformation 3
- If four quantities are in proportion, they are in proportion also by addition
- Transformation 4
- If four quantities are in proportion, they are in proportion also by subtraction
- Transformation 5
- If four quantities are in proportion, they are in proportion also by powers