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Finding the Fourth Proportional to 396,806.97, 547,595.18 and 215,521.92

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Solution

The fourth proportional to 396,806.97, 547,595.18 and 215,521.92 is: 297,421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,806.97 : 547,595.18 = 215,521.92 : x
  2. Step 2: Convert to fraction form
    396,806.97/547,595.18 = 215,521.92/x
  3. Step 3: Cross multiply
    396,806.97x = 547,595.18 × 215,521.92
  4. Step 4: Simplify right side
    396,806.97x = 118,018,764,576.35
  5. Step 5: Solve for x
    x = 118,018,764,576.35/396,806.97
  6. Step 6: Final answer
    x = 297,421.10

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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.