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Finding the Fourth Proportional to 447.29, 617.48 and 281.74

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Solution

The fourth proportional to 447.29, 617.48 and 281.74 is: 388.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.29 : 617.48 = 281.74 : x
  2. Step 2: Convert to fraction form
    447.29/617.48 = 281.74/x
  3. Step 3: Cross multiply
    447.29x = 617.48 × 281.74
  4. Step 4: Simplify right side
    447.29x = 173,968.82
  5. Step 5: Solve for x
    x = 173,968.82/447.29
  6. Step 6: Final answer
    x = 388.94

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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.