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Finding the Fourth Proportional to 321,491.88, 482,127 and 131,898.72

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Solution

The fourth proportional to 321,491.88, 482,127 and 131,898.72 is: 197,802.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,491.88 : 482,127 = 131,898.72 : x
  2. Step 2: Convert to fraction form
    321,491.88/482,127 = 131,898.72/x
  3. Step 3: Cross multiply
    321,491.88x = 482,127 × 131,898.72
  4. Step 4: Simplify right side
    321,491.88x = 63,591,934,177.44
  5. Step 5: Solve for x
    x = 63,591,934,177.44/321,491.88
  6. Step 6: Final answer
    x = 197,802.61

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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.