Home / 322.31-815.91

Finding the Third Proportional to 322.31 and 815.91

Calculator

Solution

The third proportional to 322.31 and 815.91 is: 2,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.31 : 815.91 = 815.91 : x
  2. Step 2: Convert to fraction form
    322.31/815.91 = 815.91/x
  3. Step 3: Cross multiply
    322.31x = 815.91 × 815.91
  4. Step 4: Simplify right side
    322.31x = 665,703.01
  5. Step 5: Solve for x
    x = 665,703.01/322.31
  6. Step 6: Final answer
    x = 2,065.40

Related Problems

Find third proportional to 161.16 and 407.95
Half scale
Find third proportional to 644.63 and 1,631.81
Double scale
Find third proportional to 324 and 821
Similar ratio
Find third proportional to 483.47 and 1,223.86
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.