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Finding the Fourth Proportional to 447.82, 617.98 and 251.38

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Solution

The fourth proportional to 447.82, 617.98 and 251.38 is: 346.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.82 : 617.98 = 251.38 : x
  2. Step 2: Convert to fraction form
    447.82/617.98 = 251.38/x
  3. Step 3: Cross multiply
    447.82x = 617.98 × 251.38
  4. Step 4: Simplify right side
    447.82x = 155,347.81
  5. Step 5: Solve for x
    x = 155,347.81/447.82
  6. Step 6: Final answer
    x = 346.90

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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.