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Finding the Fourth Proportional to 321,378.35, 482,285.31 and 131,872.97

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Solution

The fourth proportional to 321,378.35, 482,285.31 and 131,872.97 is: 197,898.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,378.35 : 482,285.31 = 131,872.97 : x
  2. Step 2: Convert to fraction form
    321,378.35/482,285.31 = 131,872.97/x
  3. Step 3: Cross multiply
    321,378.35x = 482,285.31 × 131,872.97
  4. Step 4: Simplify right side
    321,378.35x = 63,600,395,557.71
  5. Step 5: Solve for x
    x = 63,600,395,557.71/321,378.35
  6. Step 6: Final answer
    x = 197,898.82

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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.