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Finding the Fourth Proportional to 438,793.67, 658,115.25 and 139,207.48

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Solution

The fourth proportional to 438,793.67, 658,115.25 and 139,207.48 is: 208,787.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,793.67 : 658,115.25 = 139,207.48 : x
  2. Step 2: Convert to fraction form
    438,793.67/658,115.25 = 139,207.48/x
  3. Step 3: Cross multiply
    438,793.67x = 658,115.25 × 139,207.48
  4. Step 4: Simplify right side
    438,793.67x = 91,614,563,334.75
  5. Step 5: Solve for x
    x = 91,614,563,334.75/438,793.67
  6. Step 6: Final answer
    x = 208,787.34

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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.