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Finding the Fourth Proportional to 396,933.61, 547,765.71 and 215,644.27

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Solution

The fourth proportional to 396,933.61, 547,765.71 and 215,644.27 is: 297,587.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,933.61 : 547,765.71 = 215,644.27 : x
  2. Step 2: Convert to fraction form
    396,933.61/547,765.71 = 215,644.27/x
  3. Step 3: Cross multiply
    396,933.61x = 547,765.71 × 215,644.27
  4. Step 4: Simplify right side
    396,933.61x = 118,122,536,663.98
  5. Step 5: Solve for x
    x = 118,122,536,663.98/396,933.61
  6. Step 6: Final answer
    x = 297,587.64

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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.