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Finding the Third Proportional to 2,278.13 and 2,991.38

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Solution

The third proportional to 2,278.13 and 2,991.38 is: 3,927.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.13 : 2,991.38 = 2,991.38 : x
  2. Step 2: Convert to fraction form
    2,278.13/2,991.38 = 2,991.38/x
  3. Step 3: Cross multiply
    2,278.13x = 2,991.38 × 2,991.38
  4. Step 4: Simplify right side
    2,278.13x = 8,948,324.39
  5. Step 5: Solve for x
    x = 8,948,324.39/2,278.13
  6. Step 6: Final answer
    x = 3,927.93

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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.