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Finding the Third Proportional to 128,907 and 276,855.75

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Solution

The third proportional to 128,907 and 276,855.75 is: 594,607.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,907 : 276,855.75 = 276,855.75 : x
  2. Step 2: Convert to fraction form
    128,907/276,855.75 = 276,855.75/x
  3. Step 3: Cross multiply
    128,907x = 276,855.75 × 276,855.75
  4. Step 4: Simplify right side
    128,907x = 76,649,106,308.06
  5. Step 5: Solve for x
    x = 76,649,106,308.06/128,907
  6. Step 6: Final answer
    x = 594,607.79

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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.