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Finding the Fourth Proportional to 396,705.75, 547,452.19 and 215,416.20

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Solution

The fourth proportional to 396,705.75, 547,452.19 and 215,416.20 is: 297,273.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,705.75 : 547,452.19 = 215,416.20 : x
  2. Step 2: Convert to fraction form
    396,705.75/547,452.19 = 215,416.20/x
  3. Step 3: Cross multiply
    396,705.75x = 547,452.19 × 215,416.20
  4. Step 4: Simplify right side
    396,705.75x = 117,930,070,451.48
  5. Step 5: Solve for x
    x = 117,930,070,451.48/396,705.75
  6. Step 6: Final answer
    x = 297,273.41

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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.