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Finding the Third Proportional to 396,386 and 871,492

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Solution

The third proportional to 396,386 and 871,492 is: 1,916,057.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,386 : 871,492 = 871,492 : x
  2. Step 2: Convert to fraction form
    396,386/871,492 = 871,492/x
  3. Step 3: Cross multiply
    396,386x = 871,492 × 871,492
  4. Step 4: Simplify right side
    396,386x = 759,498,306,064
  5. Step 5: Solve for x
    x = 759,498,306,064/396,386
  6. Step 6: Final answer
    x = 1,916,057.34

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.