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Finding the Fourth Proportional to 391,151.73, 539,770.71 and 240,219.57

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Solution

The fourth proportional to 391,151.73, 539,770.71 and 240,219.57 is: 331,491.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,151.73 : 539,770.71 = 240,219.57 : x
  2. Step 2: Convert to fraction form
    391,151.73/539,770.71 = 240,219.57/x
  3. Step 3: Cross multiply
    391,151.73x = 539,770.71 × 240,219.57
  4. Step 4: Simplify right side
    391,151.73x = 129,663,487,854.80
  5. Step 5: Solve for x
    x = 129,663,487,854.80/391,151.73
  6. Step 6: Final answer
    x = 331,491.54

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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.