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Finding the Fourth Proportional to 396,712.17, 547,460.80 and 215,422.48

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Solution

The fourth proportional to 396,712.17, 547,460.80 and 215,422.48 is: 297,281.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,712.17 : 547,460.80 = 215,422.48 : x
  2. Step 2: Convert to fraction form
    396,712.17/547,460.80 = 215,422.48/x
  3. Step 3: Cross multiply
    396,712.17x = 547,460.80 × 215,422.48
  4. Step 4: Simplify right side
    396,712.17x = 117,935,363,238.78
  5. Step 5: Solve for x
    x = 117,935,363,238.78/396,712.17
  6. Step 6: Final answer
    x = 297,281.94

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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.