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Finding the Fourth Proportional to 447.34, 617.43 and 272.80

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Solution

The fourth proportional to 447.34, 617.43 and 272.80 is: 376.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.34 : 617.43 = 272.80 : x
  2. Step 2: Convert to fraction form
    447.34/617.43 = 272.80/x
  3. Step 3: Cross multiply
    447.34x = 617.43 × 272.80
  4. Step 4: Simplify right side
    447.34x = 168,434.90
  5. Step 5: Solve for x
    x = 168,434.90/447.34
  6. Step 6: Final answer
    x = 376.53

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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.