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Finding the Third Proportional to 112,639 and 261,915

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Solution

The third proportional to 112,639 and 261,915 is: 609,020.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,639 : 261,915 = 261,915 : x
  2. Step 2: Convert to fraction form
    112,639/261,915 = 261,915/x
  3. Step 3: Cross multiply
    112,639x = 261,915 × 261,915
  4. Step 4: Simplify right side
    112,639x = 68,599,467,225
  5. Step 5: Solve for x
    x = 68,599,467,225/112,639
  6. Step 6: Final answer
    x = 609,020.56

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Why These Related Problems?

These problems maintain the same ratio (2.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.