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Finding the Fourth Proportional to 382.56, 527.90 and 216.79

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Solution

The fourth proportional to 382.56, 527.90 and 216.79 is: 299.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.56 : 527.90 = 216.79 : x
  2. Step 2: Convert to fraction form
    382.56/527.90 = 216.79/x
  3. Step 3: Cross multiply
    382.56x = 527.90 × 216.79
  4. Step 4: Simplify right side
    382.56x = 114,439.72
  5. Step 5: Solve for x
    x = 114,439.72/382.56
  6. Step 6: Final answer
    x = 299.15

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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.