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Finding the Fourth Proportional to 396,520.94, 547,208.60 and 215,232.41

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Solution

The fourth proportional to 396,520.94, 547,208.60 and 215,232.41 is: 297,025.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,520.94 : 547,208.60 = 215,232.41 : x
  2. Step 2: Convert to fraction form
    396,520.94/547,208.60 = 215,232.41/x
  3. Step 3: Cross multiply
    396,520.94x = 547,208.60 × 215,232.41
  4. Step 4: Simplify right side
    396,520.94x = 117,777,021,938.52
  5. Step 5: Solve for x
    x = 117,777,021,938.52/396,520.94
  6. Step 6: Final answer
    x = 297,025.99

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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.