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Finding the Fourth Proportional to 425,671.92, 638,573.40 and 145,123.56

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Solution

The fourth proportional to 425,671.92, 638,573.40 and 145,123.56 is: 217,707.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,671.92 : 638,573.40 = 145,123.56 : x
  2. Step 2: Convert to fraction form
    425,671.92/638,573.40 = 145,123.56/x
  3. Step 3: Cross multiply
    425,671.92x = 638,573.40 × 145,123.56
  4. Step 4: Simplify right side
    425,671.92x = 92,672,045,129.30
  5. Step 5: Solve for x
    x = 92,672,045,129.30/425,671.92
  6. Step 6: Final answer
    x = 217,707.68

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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.