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Finding the Third Proportional to 201,678 and 438,916

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Solution

The third proportional to 201,678 and 438,916 is: 955,221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,678 : 438,916 = 438,916 : x
  2. Step 2: Convert to fraction form
    201,678/438,916 = 438,916/x
  3. Step 3: Cross multiply
    201,678x = 438,916 × 438,916
  4. Step 4: Simplify right side
    201,678x = 192,647,255,056
  5. Step 5: Solve for x
    x = 192,647,255,056/201,678
  6. Step 6: Final answer
    x = 955,221.96

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.