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Finding the Third Proportional to 311.82 and 670.62

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Solution

The third proportional to 311.82 and 670.62 is: 1,442.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.82 : 670.62 = 670.62 : x
  2. Step 2: Convert to fraction form
    311.82/670.62 = 670.62/x
  3. Step 3: Cross multiply
    311.82x = 670.62 × 670.62
  4. Step 4: Simplify right side
    311.82x = 449,735.27
  5. Step 5: Solve for x
    x = 449,735.27/311.82
  6. Step 6: Final answer
    x = 1,442.30

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.