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Finding the Third Proportional to 259,689 and 405,936

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Solution

The third proportional to 259,689 and 405,936 is: 634,543.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,689 : 405,936 = 405,936 : x
  2. Step 2: Convert to fraction form
    259,689/405,936 = 405,936/x
  3. Step 3: Cross multiply
    259,689x = 405,936 × 405,936
  4. Step 4: Simplify right side
    259,689x = 164,784,036,096
  5. Step 5: Solve for x
    x = 164,784,036,096/259,689
  6. Step 6: Final answer
    x = 634,543.77

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.