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Finding the Third Proportional to 511.15 and 766.55

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Solution

The third proportional to 511.15 and 766.55 is: 1,149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.15 : 766.55 = 766.55 : x
  2. Step 2: Convert to fraction form
    511.15/766.55 = 766.55/x
  3. Step 3: Cross multiply
    511.15x = 766.55 × 766.55
  4. Step 4: Simplify right side
    511.15x = 587,604.22
  5. Step 5: Solve for x
    x = 587,604.22/511.15
  6. Step 6: Final answer
    x = 1,149.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.