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Finding the Third Proportional to 201,112 and 421,808

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Solution

The third proportional to 201,112 and 421,808 is: 884,691.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,112 : 421,808 = 421,808 : x
  2. Step 2: Convert to fraction form
    201,112/421,808 = 421,808/x
  3. Step 3: Cross multiply
    201,112x = 421,808 × 421,808
  4. Step 4: Simplify right side
    201,112x = 177,921,988,864
  5. Step 5: Solve for x
    x = 177,921,988,864/201,112
  6. Step 6: Final answer
    x = 884,691.06

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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.