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Finding the Fourth Proportional to 391,111.14, 539,737.55 and 240,208.14

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Solution

The fourth proportional to 391,111.14, 539,737.55 and 240,208.14 is: 331,489.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,111.14 : 539,737.55 = 240,208.14 : x
  2. Step 2: Convert to fraction form
    391,111.14/539,737.55 = 240,208.14/x
  3. Step 3: Cross multiply
    391,111.14x = 539,737.55 × 240,208.14
  4. Step 4: Simplify right side
    391,111.14x = 129,649,352,973.66
  5. Step 5: Solve for x
    x = 129,649,352,973.66/391,111.14
  6. Step 6: Final answer
    x = 331,489.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.