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Finding the Third Proportional to 311 and 612

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Solution

The third proportional to 311 and 612 is: 1,204.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    311 : 612 = 612 : x
  2. Step 2: Convert to fraction form
    311/612 = 612/x
  3. Step 3: Cross multiply
    311x = 612 × 612
  4. Step 4: Simplify right side
    311x = 374,544
  5. Step 5: Solve for x
    x = 374,544/311
  6. Step 6: Final answer
    x = 1,204.32

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.