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Finding the Fourth Proportional to 396,557.76, 547,245.90 and 215,265.78

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Solution

The fourth proportional to 396,557.76, 547,245.90 and 215,265.78 is: 297,064.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,557.76 : 547,245.90 = 215,265.78 : x
  2. Step 2: Convert to fraction form
    396,557.76/547,245.90 = 215,265.78/x
  3. Step 3: Cross multiply
    396,557.76x = 547,245.90 × 215,265.78
  4. Step 4: Simplify right side
    396,557.76x = 117,803,315,515.30
  5. Step 5: Solve for x
    x = 117,803,315,515.30/396,557.76
  6. Step 6: Final answer
    x = 297,064.71

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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.