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Finding the Third Proportional to 198,612 and 405,972

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Solution

The third proportional to 198,612 and 405,972 is: 829,825.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,612 : 405,972 = 405,972 : x
  2. Step 2: Convert to fraction form
    198,612/405,972 = 405,972/x
  3. Step 3: Cross multiply
    198,612x = 405,972 × 405,972
  4. Step 4: Simplify right side
    198,612x = 164,813,264,784
  5. Step 5: Solve for x
    x = 164,813,264,784/198,612
  6. Step 6: Final answer
    x = 829,825.31

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.