Use case
- HomeworkComplete a partially filled table.
- ControlQuickly check results.
- Everyday lifeCalculate proportional prices, quantities, or durations.
Complete a proportionality table
Complete the missing values of a table.
Calculator
1
2
3
4
Row 1
Row 2
Results
StateIncomplete entries
k (ratio)2.50
Formula
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Leave exactly one cell empty (and fill at least one complete column) to calculate the missing value.
Definition & method
In a proportional table, the ratio between the two rows is constant.
Formula
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- Find a complete column and calculate k = r2 / r1.
- Check that the same k works on the other complete columns.
- Calculate the empty cell with r2 = k · r1 (or r1 = r2 / k).