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Finding the Fourth Proportional to 396,642.85, 547,363.99 and 215,351.10

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Solution

The fourth proportional to 396,642.85, 547,363.99 and 215,351.10 is: 297,182.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,642.85 : 547,363.99 = 215,351.10 : x
  2. Step 2: Convert to fraction form
    396,642.85/547,363.99 = 215,351.10/x
  3. Step 3: Cross multiply
    396,642.85x = 547,363.99 × 215,351.10
  4. Step 4: Simplify right side
    396,642.85x = 117,875,437,346.89
  5. Step 5: Solve for x
    x = 117,875,437,346.89/396,642.85
  6. Step 6: Final answer
    x = 297,182.81

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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.