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Finding the Fourth Proportional to 396,907.65, 547,730.37 and 215,618.13

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Solution

The fourth proportional to 396,907.65, 547,730.37 and 215,618.13 is: 297,551.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,907.65 : 547,730.37 = 215,618.13 : x
  2. Step 2: Convert to fraction form
    396,907.65/547,730.37 = 215,618.13/x
  3. Step 3: Cross multiply
    396,907.65x = 547,730.37 × 215,618.13
  4. Step 4: Simplify right side
    396,907.65x = 118,100,598,123.61
  5. Step 5: Solve for x
    x = 118,100,598,123.61/396,907.65
  6. Step 6: Final answer
    x = 297,551.83

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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.