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Finding the Fourth Proportional to 438,432.80, 658,340.40 and 251,808.80

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Solution

The fourth proportional to 438,432.80, 658,340.40 and 251,808.80 is: 378,110.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,432.80 : 658,340.40 = 251,808.80 : x
  2. Step 2: Convert to fraction form
    438,432.80/658,340.40 = 251,808.80/x
  3. Step 3: Cross multiply
    438,432.80x = 658,340.40 × 251,808.80
  4. Step 4: Simplify right side
    438,432.80x = 165,775,906,115.52
  5. Step 5: Solve for x
    x = 165,775,906,115.52/438,432.80
  6. Step 6: Final answer
    x = 378,110.18

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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.