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Finding the Fourth Proportional to 382.38, 527.60 and 216.56

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Solution

The fourth proportional to 382.38, 527.60 and 216.56 is: 298.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.38 : 527.60 = 216.56 : x
  2. Step 2: Convert to fraction form
    382.38/527.60 = 216.56/x
  3. Step 3: Cross multiply
    382.38x = 527.60 × 216.56
  4. Step 4: Simplify right side
    382.38x = 114,253.88
  5. Step 5: Solve for x
    x = 114,253.88/382.38
  6. Step 6: Final answer
    x = 298.80

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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.