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Finding the Fourth Proportional to 396,634.66, 547,352.71 and 215,342.96

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Solution

The fourth proportional to 396,634.66, 547,352.71 and 215,342.96 is: 297,171.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,634.66 : 547,352.71 = 215,342.96 : x
  2. Step 2: Convert to fraction form
    396,634.66/547,352.71 = 215,342.96/x
  3. Step 3: Cross multiply
    396,634.66x = 547,352.71 × 215,342.96
  4. Step 4: Simplify right side
    396,634.66x = 117,868,549,460.30
  5. Step 5: Solve for x
    x = 117,868,549,460.30/396,634.66
  6. Step 6: Final answer
    x = 297,171.58

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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.