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Finding the Fourth Proportional to 454.97, 629.34 and 381.17

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Solution

The fourth proportional to 454.97, 629.34 and 381.17 is: 527.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.97 : 629.34 = 381.17 : x
  2. Step 2: Convert to fraction form
    454.97/629.34 = 381.17/x
  3. Step 3: Cross multiply
    454.97x = 629.34 × 381.17
  4. Step 4: Simplify right side
    454.97x = 239,885.53
  5. Step 5: Solve for x
    x = 239,885.53/454.97
  6. Step 6: Final answer
    x = 527.26

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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.