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Finding the Fourth Proportional to 442,945.60, 664,418.40 and 440,321.20

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Solution

The fourth proportional to 442,945.60, 664,418.40 and 440,321.20 is: 660,481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,945.60 : 664,418.40 = 440,321.20 : x
  2. Step 2: Convert to fraction form
    442,945.60/664,418.40 = 440,321.20/x
  3. Step 3: Cross multiply
    442,945.60x = 664,418.40 × 440,321.20
  4. Step 4: Simplify right side
    442,945.60x = 292,557,507,190.08
  5. Step 5: Solve for x
    x = 292,557,507,190.08/442,945.60
  6. Step 6: Final answer
    x = 660,481.80

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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.