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Finding the Third Proportional to 515.11 and 1,109.95

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Solution

The third proportional to 515.11 and 1,109.95 is: 2,391.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.11 : 1,109.95 = 1,109.95 : x
  2. Step 2: Convert to fraction form
    515.11/1,109.95 = 1,109.95/x
  3. Step 3: Cross multiply
    515.11x = 1,109.95 × 1,109.95
  4. Step 4: Simplify right side
    515.11x = 1,231,995.94
  5. Step 5: Solve for x
    x = 1,231,995.94/515.11
  6. Step 6: Final answer
    x = 2,391.72

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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.