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Finding the Third Proportional to 128,864 and 279,864

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Solution

The third proportional to 128,864 and 279,864 is: 607,802.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,864 : 279,864 = 279,864 : x
  2. Step 2: Convert to fraction form
    128,864/279,864 = 279,864/x
  3. Step 3: Cross multiply
    128,864x = 279,864 × 279,864
  4. Step 4: Simplify right side
    128,864x = 78,323,858,496
  5. Step 5: Solve for x
    x = 78,323,858,496/128,864
  6. Step 6: Final answer
    x = 607,802.48

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.