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Finding the Fourth Proportional to 442,819.80, 664,229.70 and 419,491.80

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Solution

The fourth proportional to 442,819.80, 664,229.70 and 419,491.80 is: 629,237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,819.80 : 664,229.70 = 419,491.80 : x
  2. Step 2: Convert to fraction form
    442,819.80/664,229.70 = 419,491.80/x
  3. Step 3: Cross multiply
    442,819.80x = 664,229.70 × 419,491.80
  4. Step 4: Simplify right side
    442,819.80x = 278,638,912,466.46
  5. Step 5: Solve for x
    x = 278,638,912,466.46/442,819.80
  6. Step 6: Final answer
    x = 629,237.70

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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.