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Finding the Third Proportional to 196,515 and 421,065

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Solution

The third proportional to 196,515 and 421,065 is: 902,199.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,515 : 421,065 = 421,065 : x
  2. Step 2: Convert to fraction form
    196,515/421,065 = 421,065/x
  3. Step 3: Cross multiply
    196,515x = 421,065 × 421,065
  4. Step 4: Simplify right side
    196,515x = 177,295,734,225
  5. Step 5: Solve for x
    x = 177,295,734,225/196,515
  6. Step 6: Final answer
    x = 902,199.50

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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.