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Finding the Third Proportional to 306,081 and 649,215

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Solution

The third proportional to 306,081 and 649,215 is: 1,377,021.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,081 : 649,215 = 649,215 : x
  2. Step 2: Convert to fraction form
    306,081/649,215 = 649,215/x
  3. Step 3: Cross multiply
    306,081x = 649,215 × 649,215
  4. Step 4: Simplify right side
    306,081x = 421,480,116,225
  5. Step 5: Solve for x
    x = 421,480,116,225/306,081
  6. Step 6: Final answer
    x = 1,377,021.50

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.