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Finding the Fourth Proportional to 429,781.30, 643,785.99 and 251,748.57

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Solution

The fourth proportional to 429,781.30, 643,785.99 and 251,748.57 is: 377,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,781.30 : 643,785.99 = 251,748.57 : x
  2. Step 2: Convert to fraction form
    429,781.30/643,785.99 = 251,748.57/x
  3. Step 3: Cross multiply
    429,781.30x = 643,785.99 × 251,748.57
  4. Step 4: Simplify right side
    429,781.30x = 162,072,202,368.53
  5. Step 5: Solve for x
    x = 162,072,202,368.53/429,781.30
  6. Step 6: Final answer
    x = 377,103.90

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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.