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Finding the Fourth Proportional to 391,123.98, 539,994.87 and 268,826.94

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Solution

The fourth proportional to 391,123.98, 539,994.87 and 268,826.94 is: 371,148.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,123.98 : 539,994.87 = 268,826.94 : x
  2. Step 2: Convert to fraction form
    391,123.98/539,994.87 = 268,826.94/x
  3. Step 3: Cross multiply
    391,123.98x = 539,994.87 × 268,826.94
  4. Step 4: Simplify right side
    391,123.98x = 145,165,168,517.80
  5. Step 5: Solve for x
    x = 145,165,168,517.80/391,123.98
  6. Step 6: Final answer
    x = 371,148.73

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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.