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Finding the Fourth Proportional to 396,910.55, 547,737.03 and 215,622.60

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Solution

The fourth proportional to 396,910.55, 547,737.03 and 215,622.60 is: 297,559.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,910.55 : 547,737.03 = 215,622.60 : x
  2. Step 2: Convert to fraction form
    396,910.55/547,737.03 = 215,622.60/x
  3. Step 3: Cross multiply
    396,910.55x = 547,737.03 × 215,622.60
  4. Step 4: Simplify right side
    396,910.55x = 118,104,482,524.88
  5. Step 5: Solve for x
    x = 118,104,482,524.88/396,910.55
  6. Step 6: Final answer
    x = 297,559.44

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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.