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Finding the Fourth Proportional to 385.24, 576.68 and 311.43

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Solution

The fourth proportional to 385.24, 576.68 and 311.43 is: 466.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.24 : 576.68 = 311.43 : x
  2. Step 2: Convert to fraction form
    385.24/576.68 = 311.43/x
  3. Step 3: Cross multiply
    385.24x = 576.68 × 311.43
  4. Step 4: Simplify right side
    385.24x = 179,596.23
  5. Step 5: Solve for x
    x = 179,596.23/385.24
  6. Step 6: Final answer
    x = 466.20

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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.