Home / 278,781.75-387,919.13

Finding the Third Proportional to 278,781.75 and 387,919.13

Calculator

Solution

The third proportional to 278,781.75 and 387,919.13 is: 539,781.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,781.75 : 387,919.13 = 387,919.13 : x
  2. Step 2: Convert to fraction form
    278,781.75/387,919.13 = 387,919.13/x
  3. Step 3: Cross multiply
    278,781.75x = 387,919.13 × 387,919.13
  4. Step 4: Simplify right side
    278,781.75x = 150,481,247,540.77
  5. Step 5: Solve for x
    x = 150,481,247,540.77/278,781.75
  6. Step 6: Final answer
    x = 539,781.56

Related Problems

Find third proportional to 139,390.88 and 193,959.56
Half scale
Find third proportional to 557,563.50 and 775,838.25
Double scale
Find third proportional to 278,784 and 387,922
Similar ratio
Find third proportional to 418,172.63 and 581,878.69
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.