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Finding the Fourth Proportional to 438,905.60, 658,358.40 and 404,691.20

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Solution

The fourth proportional to 438,905.60, 658,358.40 and 404,691.20 is: 607,036.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,905.60 : 658,358.40 = 404,691.20 : x
  2. Step 2: Convert to fraction form
    438,905.60/658,358.40 = 404,691.20/x
  3. Step 3: Cross multiply
    438,905.60x = 658,358.40 × 404,691.20
  4. Step 4: Simplify right side
    438,905.60x = 266,431,850,926.08
  5. Step 5: Solve for x
    x = 266,431,850,926.08/438,905.60
  6. Step 6: Final answer
    x = 607,036.80

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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.