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Finding the Third Proportional to 100,406 and 218,313

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Solution

The third proportional to 100,406 and 218,313 is: 474,678.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,406 : 218,313 = 218,313 : x
  2. Step 2: Convert to fraction form
    100,406/218,313 = 218,313/x
  3. Step 3: Cross multiply
    100,406x = 218,313 × 218,313
  4. Step 4: Simplify right side
    100,406x = 47,660,565,969
  5. Step 5: Solve for x
    x = 47,660,565,969/100,406
  6. Step 6: Final answer
    x = 474,678.47

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.