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Finding the Fourth Proportional to 447.38, 617.40 and 272.73

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Solution

The fourth proportional to 447.38, 617.40 and 272.73 is: 376.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.38 : 617.40 = 272.73 : x
  2. Step 2: Convert to fraction form
    447.38/617.40 = 272.73/x
  3. Step 3: Cross multiply
    447.38x = 617.40 × 272.73
  4. Step 4: Simplify right side
    447.38x = 168,383.50
  5. Step 5: Solve for x
    x = 168,383.50/447.38
  6. Step 6: Final answer
    x = 376.38

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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.