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Finding the Third Proportional to 215,786 and 326,678

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Solution

The third proportional to 215,786 and 326,678 is: 494,557.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,786 : 326,678 = 326,678 : x
  2. Step 2: Convert to fraction form
    215,786/326,678 = 326,678/x
  3. Step 3: Cross multiply
    215,786x = 326,678 × 326,678
  4. Step 4: Simplify right side
    215,786x = 106,718,515,684
  5. Step 5: Solve for x
    x = 106,718,515,684/215,786
  6. Step 6: Final answer
    x = 494,557.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.