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Finding the Third Proportional to 380,781 and 827,211

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Solution

The third proportional to 380,781 and 827,211 is: 1,797,038.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,781 : 827,211 = 827,211 : x
  2. Step 2: Convert to fraction form
    380,781/827,211 = 827,211/x
  3. Step 3: Cross multiply
    380,781x = 827,211 × 827,211
  4. Step 4: Simplify right side
    380,781x = 684,278,038,521
  5. Step 5: Solve for x
    x = 684,278,038,521/380,781
  6. Step 6: Final answer
    x = 1,797,038.29

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.