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Finding the Fourth Proportional to 381.98, 527.13 and 216.22

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Solution

The fourth proportional to 381.98, 527.13 and 216.22 is: 298.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.98 : 527.13 = 216.22 : x
  2. Step 2: Convert to fraction form
    381.98/527.13 = 216.22/x
  3. Step 3: Cross multiply
    381.98x = 527.13 × 216.22
  4. Step 4: Simplify right side
    381.98x = 113,974.73
  5. Step 5: Solve for x
    x = 113,974.73/381.98
  6. Step 6: Final answer
    x = 298.38

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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.