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Finding the Third Proportional to 120,636 and 257,836

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Solution

The third proportional to 120,636 and 257,836 is: 551,074.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,636 : 257,836 = 257,836 : x
  2. Step 2: Convert to fraction form
    120,636/257,836 = 257,836/x
  3. Step 3: Cross multiply
    120,636x = 257,836 × 257,836
  4. Step 4: Simplify right side
    120,636x = 66,479,402,896
  5. Step 5: Solve for x
    x = 66,479,402,896/120,636
  6. Step 6: Final answer
    x = 551,074.33

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.