In partitive proportion, there is a relationship between the ratio, for example:
3:5
To solve partitive proportion, first you must add 3 and 5 to a total, but if you are going to add both of them, you will put x on it, so that it can balance the relationship.
Example:
A piece of wood was in the length of 204, with a ratio of 1:5. Find the measurements.
First add them, then place x or n or any variable.
1x+5x=204
Then add all terms
6x=204
Divide both sides by 6
x=34
Substitute the value:
34:170
then simplify
1:5
Hope this helps =)