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Finding the Fourth Proportional to 396,507.02, 547,171.00 and 215,219.30

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Solution

The fourth proportional to 396,507.02, 547,171.00 and 215,219.30 is: 296,997.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,507.02 : 547,171.00 = 215,219.30 : x
  2. Step 2: Convert to fraction form
    396,507.02/547,171.00 = 215,219.30/x
  3. Step 3: Cross multiply
    396,507.02x = 547,171.00 × 215,219.30
  4. Step 4: Simplify right side
    396,507.02x = 117,761,756,326.40
  5. Step 5: Solve for x
    x = 117,761,756,326.40/396,507.02
  6. Step 6: Final answer
    x = 296,997.91

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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.