Home / 278,721-411,520.50

Finding the Third Proportional to 278,721 and 411,520.50

Calculator

Solution

The third proportional to 278,721 and 411,520.50 is: 607,593.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,721 : 411,520.50 = 411,520.50 : x
  2. Step 2: Convert to fraction form
    278,721/411,520.50 = 411,520.50/x
  3. Step 3: Cross multiply
    278,721x = 411,520.50 × 411,520.50
  4. Step 4: Simplify right side
    278,721x = 169,349,121,920.25
  5. Step 5: Solve for x
    x = 169,349,121,920.25/278,721
  6. Step 6: Final answer
    x = 607,593.69

Related Problems

Find third proportional to 139,360.50 and 205,760.25
Half scale
Find third proportional to 557,442 and 823,041
Double scale
Find third proportional to 278,723 and 411,523
Similar ratio
Find third proportional to 418,081.50 and 617,280.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.