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Finding the Fourth Proportional to 253,240.46, 379,691.96 and 139,441.87

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Solution

The fourth proportional to 253,240.46, 379,691.96 and 139,441.87 is: 209,069.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,240.46 : 379,691.96 = 139,441.87 : x
  2. Step 2: Convert to fraction form
    253,240.46/379,691.96 = 139,441.87/x
  3. Step 3: Cross multiply
    253,240.46x = 379,691.96 × 139,441.87
  4. Step 4: Simplify right side
    253,240.46x = 52,944,956,703.77
  5. Step 5: Solve for x
    x = 52,944,956,703.77/253,240.46
  6. Step 6: Final answer
    x = 209,069.90

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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.