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Finding the Third Proportional to 1,517.91 and 3,117.66

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Solution

The third proportional to 1,517.91 and 3,117.66 is: 6,403.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.91 : 3,117.66 = 3,117.66 : x
  2. Step 2: Convert to fraction form
    1,517.91/3,117.66 = 3,117.66/x
  3. Step 3: Cross multiply
    1,517.91x = 3,117.66 × 3,117.66
  4. Step 4: Simplify right side
    1,517.91x = 9,719,780.49
  5. Step 5: Solve for x
    x = 9,719,780.49/1,517.91
  6. Step 6: Final answer
    x = 6,403.41

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.