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Finding the Fourth Proportional to 447.91, 617.91 and 277.49

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Solution

The fourth proportional to 447.91, 617.91 and 277.49 is: 382.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.91 : 617.91 = 277.49 : x
  2. Step 2: Convert to fraction form
    447.91/617.91 = 277.49/x
  3. Step 3: Cross multiply
    447.91x = 617.91 × 277.49
  4. Step 4: Simplify right side
    447.91x = 171,463.85
  5. Step 5: Solve for x
    x = 171,463.85/447.91
  6. Step 6: Final answer
    x = 382.81

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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.