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Finding the Fourth Proportional to 396,499.88, 547,170.38 and 215,211.84

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Solution

The fourth proportional to 396,499.88, 547,170.38 and 215,211.84 is: 296,992.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,499.88 : 547,170.38 = 215,211.84 : x
  2. Step 2: Convert to fraction form
    396,499.88/547,170.38 = 215,211.84/x
  3. Step 3: Cross multiply
    396,499.88x = 547,170.38 × 215,211.84
  4. Step 4: Simplify right side
    396,499.88x = 117,757,543,197.24
  5. Step 5: Solve for x
    x = 117,757,543,197.24/396,499.88
  6. Step 6: Final answer
    x = 296,992.64

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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.