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Finding the Fourth Proportional to 429,349.10, 644,023.65 and 391,951.40

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Solution

The fourth proportional to 429,349.10, 644,023.65 and 391,951.40 is: 587,927.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,349.10 : 644,023.65 = 391,951.40 : x
  2. Step 2: Convert to fraction form
    429,349.10/644,023.65 = 391,951.40/x
  3. Step 3: Cross multiply
    429,349.10x = 644,023.65 × 391,951.40
  4. Step 4: Simplify right side
    429,349.10x = 252,425,971,250.61
  5. Step 5: Solve for x
    x = 252,425,971,250.61/429,349.10
  6. Step 6: Final answer
    x = 587,927.10

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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.