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Finding the Fourth Proportional to 396,506.56, 547,179.59 and 215,218.53

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Solution

The fourth proportional to 396,506.56, 547,179.59 and 215,218.53 is: 297,001.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,506.56 : 547,179.59 = 215,218.53 : x
  2. Step 2: Convert to fraction form
    396,506.56/547,179.59 = 215,218.53/x
  3. Step 3: Cross multiply
    396,506.56x = 547,179.59 × 215,218.53
  4. Step 4: Simplify right side
    396,506.56x = 117,763,187,005.80
  5. Step 5: Solve for x
    x = 117,763,187,005.80/396,506.56
  6. Step 6: Final answer
    x = 297,001.86

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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.