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Finding the Third Proportional to 306.50 and 451.75

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Solution

The third proportional to 306.50 and 451.75 is: 665.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.50 : 451.75 = 451.75 : x
  2. Step 2: Convert to fraction form
    306.50/451.75 = 451.75/x
  3. Step 3: Cross multiply
    306.50x = 451.75 × 451.75
  4. Step 4: Simplify right side
    306.50x = 204,078.06
  5. Step 5: Solve for x
    x = 204,078.06/306.50
  6. Step 6: Final answer
    x = 665.83

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.