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Finding the Fourth Proportional to 447.25, 617.21 and 272.56

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Solution

The fourth proportional to 447.25, 617.21 and 272.56 is: 376.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.25 : 617.21 = 272.56 : x
  2. Step 2: Convert to fraction form
    447.25/617.21 = 272.56/x
  3. Step 3: Cross multiply
    447.25x = 617.21 × 272.56
  4. Step 4: Simplify right side
    447.25x = 168,226.76
  5. Step 5: Solve for x
    x = 168,226.76/447.25
  6. Step 6: Final answer
    x = 376.14

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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.