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Finding the Third Proportional to 207,811 and 322,409

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Solution

The third proportional to 207,811 and 322,409 is: 500,202.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,811 : 322,409 = 322,409 : x
  2. Step 2: Convert to fraction form
    207,811/322,409 = 322,409/x
  3. Step 3: Cross multiply
    207,811x = 322,409 × 322,409
  4. Step 4: Simplify right side
    207,811x = 103,947,563,281
  5. Step 5: Solve for x
    x = 103,947,563,281/207,811
  6. Step 6: Final answer
    x = 500,202.41

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.