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Finding the Fourth Proportional to 420,244.68, 630,372.52 and 139,761.96

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Solution

The fourth proportional to 420,244.68, 630,372.52 and 139,761.96 is: 209,644.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,244.68 : 630,372.52 = 139,761.96 : x
  2. Step 2: Convert to fraction form
    420,244.68/630,372.52 = 139,761.96/x
  3. Step 3: Cross multiply
    420,244.68x = 630,372.52 × 139,761.96
  4. Step 4: Simplify right side
    420,244.68x = 88,102,098,925.34
  5. Step 5: Solve for x
    x = 88,102,098,925.34/420,244.68
  6. Step 6: Final answer
    x = 209,644.77

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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.