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Finding the Third Proportional to 311.77 and 475.03

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Solution

The third proportional to 311.77 and 475.03 is: 723.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.77 : 475.03 = 475.03 : x
  2. Step 2: Convert to fraction form
    311.77/475.03 = 475.03/x
  3. Step 3: Cross multiply
    311.77x = 475.03 × 475.03
  4. Step 4: Simplify right side
    311.77x = 225,654.69
  5. Step 5: Solve for x
    x = 225,654.69/311.77
  6. Step 6: Final answer
    x = 723.80

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.