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Finding the Third Proportional to 128,539 and 276,815

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Solution

The third proportional to 128,539 and 276,815 is: 596,134.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,539 : 276,815 = 276,815 : x
  2. Step 2: Convert to fraction form
    128,539/276,815 = 276,815/x
  3. Step 3: Cross multiply
    128,539x = 276,815 × 276,815
  4. Step 4: Simplify right side
    128,539x = 76,626,544,225
  5. Step 5: Solve for x
    x = 76,626,544,225/128,539
  6. Step 6: Final answer
    x = 596,134.59

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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.