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Finding the Third Proportional to 200,856 and 311,009

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Solution

The third proportional to 200,856 and 311,009 is: 481,571.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,856 : 311,009 = 311,009 : x
  2. Step 2: Convert to fraction form
    200,856/311,009 = 311,009/x
  3. Step 3: Cross multiply
    200,856x = 311,009 × 311,009
  4. Step 4: Simplify right side
    200,856x = 96,726,598,081
  5. Step 5: Solve for x
    x = 96,726,598,081/200,856
  6. Step 6: Final answer
    x = 481,571.86

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.