Tools Central

Rule of three with table

Solve a proportionality using a table.

Calculator

Known value (line 1)
Corresponding to a
New value

Proportionality table

a
10.00
c
4.00
b
25.00
x
10.00
Formula
—

Examples

Click to prefill

Table method

The proportionality coefficient is the same in each column.

Formula
—
  1. Construct the table with the known values.
  2. Calculate the coefficient b / a.
  3. Multiply this coefficient by c.