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Finding the Third Proportional to 311.34 and 497.39

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Solution

The third proportional to 311.34 and 497.39 is: 794.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.34 : 497.39 = 497.39 : x
  2. Step 2: Convert to fraction form
    311.34/497.39 = 497.39/x
  3. Step 3: Cross multiply
    311.34x = 497.39 × 497.39
  4. Step 4: Simplify right side
    311.34x = 247,397.43
  5. Step 5: Solve for x
    x = 247,397.43/311.34
  6. Step 6: Final answer
    x = 794.61

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.