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Finding the Third Proportional to 395.30 and 516.09

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Solution

The third proportional to 395.30 and 516.09 is: 673.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.30 : 516.09 = 516.09 : x
  2. Step 2: Convert to fraction form
    395.30/516.09 = 516.09/x
  3. Step 3: Cross multiply
    395.30x = 516.09 × 516.09
  4. Step 4: Simplify right side
    395.30x = 266,352.76
  5. Step 5: Solve for x
    x = 266,352.76/395.30
  6. Step 6: Final answer
    x = 673.80

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.