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Finding the Fourth Proportional to 447.78, 617.13 and 331.14

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Solution

The fourth proportional to 447.78, 617.13 and 331.14 is: 456.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.78 : 617.13 = 331.14 : x
  2. Step 2: Convert to fraction form
    447.78/617.13 = 331.14/x
  3. Step 3: Cross multiply
    447.78x = 617.13 × 331.14
  4. Step 4: Simplify right side
    447.78x = 204,356.43
  5. Step 5: Solve for x
    x = 204,356.43/447.78
  6. Step 6: Final answer
    x = 456.38

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Double scale
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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.