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Finding the Third Proportional to 431,422 and 653,165

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Solution

The third proportional to 431,422 and 653,165 is: 988,879.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,422 : 653,165 = 653,165 : x
  2. Step 2: Convert to fraction form
    431,422/653,165 = 653,165/x
  3. Step 3: Cross multiply
    431,422x = 653,165 × 653,165
  4. Step 4: Simplify right side
    431,422x = 426,624,517,225
  5. Step 5: Solve for x
    x = 426,624,517,225/431,422
  6. Step 6: Final answer
    x = 988,879.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.