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Finding the Third Proportional to 511,951 and 689,187

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Solution

The third proportional to 511,951 and 689,187 is: 927,781.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,951 : 689,187 = 689,187 : x
  2. Step 2: Convert to fraction form
    511,951/689,187 = 689,187/x
  3. Step 3: Cross multiply
    511,951x = 689,187 × 689,187
  4. Step 4: Simplify right side
    511,951x = 474,978,720,969
  5. Step 5: Solve for x
    x = 474,978,720,969/511,951
  6. Step 6: Final answer
    x = 927,781.61

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.