Home / 311,918-656,430

Finding the Third Proportional to 311,918 and 656,430

Calculator

Solution

The third proportional to 311,918 and 656,430 is: 1,381,453.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,918 : 656,430 = 656,430 : x
  2. Step 2: Convert to fraction form
    311,918/656,430 = 656,430/x
  3. Step 3: Cross multiply
    311,918x = 656,430 × 656,430
  4. Step 4: Simplify right side
    311,918x = 430,900,344,900
  5. Step 5: Solve for x
    x = 430,900,344,900/311,918
  6. Step 6: Final answer
    x = 1,381,453.92

Related Problems

Find third proportional to 155,959 and 328,215
Half scale
Find third proportional to 623,836 and 1,312,860
Double scale
Find third proportional to 311,920 and 656,434
Similar ratio
Find third proportional to 467,877 and 984,645
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.