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Finding the Third Proportional to 189,984 and 405,394

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Solution

The third proportional to 189,984 and 405,394 is: 865,042.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,984 : 405,394 = 405,394 : x
  2. Step 2: Convert to fraction form
    189,984/405,394 = 405,394/x
  3. Step 3: Cross multiply
    189,984x = 405,394 × 405,394
  4. Step 4: Simplify right side
    189,984x = 164,344,295,236
  5. Step 5: Solve for x
    x = 164,344,295,236/189,984
  6. Step 6: Final answer
    x = 865,042.82

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.