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Finding the Third Proportional to 103,686 and 217,815

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Solution

The third proportional to 103,686 and 217,815 is: 457,567.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,686 : 217,815 = 217,815 : x
  2. Step 2: Convert to fraction form
    103,686/217,815 = 217,815/x
  3. Step 3: Cross multiply
    103,686x = 217,815 × 217,815
  4. Step 4: Simplify right side
    103,686x = 47,443,374,225
  5. Step 5: Solve for x
    x = 47,443,374,225/103,686
  6. Step 6: Final answer
    x = 457,567.79

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.