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Finding the Fourth Proportional to 396,511, 547,176.52 and 215,223.28

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Solution

The fourth proportional to 396,511, 547,176.52 and 215,223.28 is: 297,003.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,511 : 547,176.52 = 215,223.28 : x
  2. Step 2: Convert to fraction form
    396,511/547,176.52 = 215,223.28/x
  3. Step 3: Cross multiply
    396,511x = 547,176.52 × 215,223.28
  4. Step 4: Simplify right side
    396,511x = 117,765,125,373.39
  5. Step 5: Solve for x
    x = 117,765,125,373.39/396,511
  6. Step 6: Final answer
    x = 297,003.43

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1.5x scale

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.