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Finding the Third Proportional to 311.81 and 484.13

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Solution

The third proportional to 311.81 and 484.13 is: 751.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.81 : 484.13 = 484.13 : x
  2. Step 2: Convert to fraction form
    311.81/484.13 = 484.13/x
  3. Step 3: Cross multiply
    311.81x = 484.13 × 484.13
  4. Step 4: Simplify right side
    311.81x = 234,377.02
  5. Step 5: Solve for x
    x = 234,377.02/311.81
  6. Step 6: Final answer
    x = 751.66

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.