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Finding the Third Proportional to 196,904 and 421,804

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Solution

The third proportional to 196,904 and 421,804 is: 903,580.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,904 : 421,804 = 421,804 : x
  2. Step 2: Convert to fraction form
    196,904/421,804 = 421,804/x
  3. Step 3: Cross multiply
    196,904x = 421,804 × 421,804
  4. Step 4: Simplify right side
    196,904x = 177,918,614,416
  5. Step 5: Solve for x
    x = 177,918,614,416/196,904
  6. Step 6: Final answer
    x = 903,580.50

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.