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Finding the Fourth Proportional to 396,641.85, 547,362.61 and 215,350.10

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Solution

The fourth proportional to 396,641.85, 547,362.61 and 215,350.10 is: 297,181.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,641.85 : 547,362.61 = 215,350.10 : x
  2. Step 2: Convert to fraction form
    396,641.85/547,362.61 = 215,350.10/x
  3. Step 3: Cross multiply
    396,641.85x = 547,362.61 × 215,350.10
  4. Step 4: Simplify right side
    396,641.85x = 117,874,595,867.44
  5. Step 5: Solve for x
    x = 117,874,595,867.44/396,641.85
  6. Step 6: Final answer
    x = 297,181.44

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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.