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Finding the Third Proportional to 311 and 476

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Solution

The third proportional to 311 and 476 is: 728.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    311 : 476 = 476 : x
  2. Step 2: Convert to fraction form
    311/476 = 476/x
  3. Step 3: Cross multiply
    311x = 476 × 476
  4. Step 4: Simplify right side
    311x = 226,576
  5. Step 5: Solve for x
    x = 226,576/311
  6. Step 6: Final answer
    x = 728.54

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.