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Finding the Fourth Proportional to 398,737.12, 550,257.12 and 219,889.12

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Solution

The fourth proportional to 398,737.12, 550,257.12 and 219,889.12 is: 303,446.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,737.12 : 550,257.12 = 219,889.12 : x
  2. Step 2: Convert to fraction form
    398,737.12/550,257.12 = 219,889.12/x
  3. Step 3: Cross multiply
    398,737.12x = 550,257.12 × 219,889.12
  4. Step 4: Simplify right side
    398,737.12x = 120,995,553,890.53
  5. Step 5: Solve for x
    x = 120,995,553,890.53/398,737.12
  6. Step 6: Final answer
    x = 303,446.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.