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Finding the Fourth Proportional to 384.38, 576.60 and 255.23

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Solution

The fourth proportional to 384.38, 576.60 and 255.23 is: 382.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.38 : 576.60 = 255.23 : x
  2. Step 2: Convert to fraction form
    384.38/576.60 = 255.23/x
  3. Step 3: Cross multiply
    384.38x = 576.60 × 255.23
  4. Step 4: Simplify right side
    384.38x = 147,165.62
  5. Step 5: Solve for x
    x = 147,165.62/384.38
  6. Step 6: Final answer
    x = 382.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.