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Finding the Third Proportional to 120,420 and 259,888

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Solution

The third proportional to 120,420 and 259,888 is: 560,885.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,420 : 259,888 = 259,888 : x
  2. Step 2: Convert to fraction form
    120,420/259,888 = 259,888/x
  3. Step 3: Cross multiply
    120,420x = 259,888 × 259,888
  4. Step 4: Simplify right side
    120,420x = 67,541,772,544
  5. Step 5: Solve for x
    x = 67,541,772,544/120,420
  6. Step 6: Final answer
    x = 560,885.01

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.