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Finding the Fourth Proportional to 396,909.66, 547,733.12 and 215,620.14

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Solution

The fourth proportional to 396,909.66, 547,733.12 and 215,620.14 is: 297,554.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,909.66 : 547,733.12 = 215,620.14 : x
  2. Step 2: Convert to fraction form
    396,909.66/547,733.12 = 215,620.14/x
  3. Step 3: Cross multiply
    396,909.66x = 547,733.12 × 215,620.14
  4. Step 4: Simplify right side
    396,909.66x = 118,102,292,017.04
  5. Step 5: Solve for x
    x = 118,102,292,017.04/396,909.66
  6. Step 6: Final answer
    x = 297,554.59

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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.