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Finding the Third Proportional to 2,185.31 and 3,117.66

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Solution

The third proportional to 2,185.31 and 3,117.66 is: 4,447.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.31 : 3,117.66 = 3,117.66 : x
  2. Step 2: Convert to fraction form
    2,185.31/3,117.66 = 3,117.66/x
  3. Step 3: Cross multiply
    2,185.31x = 3,117.66 × 3,117.66
  4. Step 4: Simplify right side
    2,185.31x = 9,719,780.49
  5. Step 5: Solve for x
    x = 9,719,780.49/2,185.31
  6. Step 6: Final answer
    x = 4,447.78

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.