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Finding the Third Proportional to 398,215 and 843,068

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Solution

The third proportional to 398,215 and 843,068 is: 1,784,874.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,215 : 843,068 = 843,068 : x
  2. Step 2: Convert to fraction form
    398,215/843,068 = 843,068/x
  3. Step 3: Cross multiply
    398,215x = 843,068 × 843,068
  4. Step 4: Simplify right side
    398,215x = 710,763,652,624
  5. Step 5: Solve for x
    x = 710,763,652,624/398,215
  6. Step 6: Final answer
    x = 1,784,874.13

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.