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Finding the Third Proportional to 1,256,861.81 and 2,690,865.56

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Solution

The third proportional to 1,256,861.81 and 2,690,865.56 is: 5,760,981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256,861.81 : 2,690,865.56 = 2,690,865.56 : x
  2. Step 2: Convert to fraction form
    1,256,861.81/2,690,865.56 = 2,690,865.56/x
  3. Step 3: Cross multiply
    1,256,861.81x = 2,690,865.56 × 2,690,865.56
  4. Step 4: Simplify right side
    1,256,861.81x = 7,240,757,475,448.44
  5. Step 5: Solve for x
    x = 7,240,757,475,448.44/1,256,861.81
  6. Step 6: Final answer
    x = 5,760,981.36

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.