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Finding the Third Proportional to 100,440 and 218,739

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Solution

The third proportional to 100,440 and 218,739 is: 476,371.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,440 : 218,739 = 218,739 : x
  2. Step 2: Convert to fraction form
    100,440/218,739 = 218,739/x
  3. Step 3: Cross multiply
    100,440x = 218,739 × 218,739
  4. Step 4: Simplify right side
    100,440x = 47,846,750,121
  5. Step 5: Solve for x
    x = 47,846,750,121/100,440
  6. Step 6: Final answer
    x = 476,371.47

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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.