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Finding the Fourth Proportional to 396,517.54, 547,194.70 and 215,229.37

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Solution

The fourth proportional to 396,517.54, 547,194.70 and 215,229.37 is: 297,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,517.54 : 547,194.70 = 215,229.37 : x
  2. Step 2: Convert to fraction form
    396,517.54/547,194.70 = 215,229.37/x
  3. Step 3: Cross multiply
    396,517.54x = 547,194.70 × 215,229.37
  4. Step 4: Simplify right side
    396,517.54x = 117,772,370,548.34
  5. Step 5: Solve for x
    x = 117,772,370,548.34/396,517.54
  6. Step 6: Final answer
    x = 297,016.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.