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Finding the Fourth Proportional to 429,770.59, 643,769.95 and 251,737.86

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Solution

The fourth proportional to 429,770.59, 643,769.95 and 251,737.86 is: 377,087.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,770.59 : 643,769.95 = 251,737.86 : x
  2. Step 2: Convert to fraction form
    429,770.59/643,769.95 = 251,737.86/x
  3. Step 3: Cross multiply
    429,770.59x = 643,769.95 × 251,737.86
  4. Step 4: Simplify right side
    429,770.59x = 162,061,269,545.31
  5. Step 5: Solve for x
    x = 162,061,269,545.31/429,770.59
  6. Step 6: Final answer
    x = 377,087.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.