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Finding the Fourth Proportional to 442,997.20, 664,495.80 and 380,789.20

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Solution

The fourth proportional to 442,997.20, 664,495.80 and 380,789.20 is: 571,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,997.20 : 664,495.80 = 380,789.20 : x
  2. Step 2: Convert to fraction form
    442,997.20/664,495.80 = 380,789.20/x
  3. Step 3: Cross multiply
    442,997.20x = 664,495.80 × 380,789.20
  4. Step 4: Simplify right side
    442,997.20x = 253,032,824,085.36
  5. Step 5: Solve for x
    x = 253,032,824,085.36/442,997.20
  6. Step 6: Final answer
    x = 571,183.80

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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.