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Finding the Fourth Proportional to 396,908.65, 547,731.75 and 215,619.13

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Solution

The fourth proportional to 396,908.65, 547,731.75 and 215,619.13 is: 297,553.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,908.65 : 547,731.75 = 215,619.13 : x
  2. Step 2: Convert to fraction form
    396,908.65/547,731.75 = 215,619.13/x
  3. Step 3: Cross multiply
    396,908.65x = 547,731.75 × 215,619.13
  4. Step 4: Simplify right side
    396,908.65x = 118,101,443,408.38
  5. Step 5: Solve for x
    x = 118,101,443,408.38/396,908.65
  6. Step 6: Final answer
    x = 297,553.21

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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.