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Finding the Third Proportional to 120,636 and 259,407

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Solution

The third proportional to 120,636 and 259,407 is: 557,810.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,636 : 259,407 = 259,407 : x
  2. Step 2: Convert to fraction form
    120,636/259,407 = 259,407/x
  3. Step 3: Cross multiply
    120,636x = 259,407 × 259,407
  4. Step 4: Simplify right side
    120,636x = 67,291,991,649
  5. Step 5: Solve for x
    x = 67,291,991,649/120,636
  6. Step 6: Final answer
    x = 557,810.20

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.