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Finding the Third Proportional to 1,991.38 and 2,785.13

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Solution

The third proportional to 1,991.38 and 2,785.13 is: 3,895.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.38 : 2,785.13 = 2,785.13 : x
  2. Step 2: Convert to fraction form
    1,991.38/2,785.13 = 2,785.13/x
  3. Step 3: Cross multiply
    1,991.38x = 2,785.13 × 2,785.13
  4. Step 4: Simplify right side
    1,991.38x = 7,756,921.27
  5. Step 5: Solve for x
    x = 7,756,921.27/1,991.38
  6. Step 6: Final answer
    x = 3,895.26

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.