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Finding the Third Proportional to 128,673 and 278,814

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Solution

The third proportional to 128,673 and 278,814 is: 604,145.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,673 : 278,814 = 278,814 : x
  2. Step 2: Convert to fraction form
    128,673/278,814 = 278,814/x
  3. Step 3: Cross multiply
    128,673x = 278,814 × 278,814
  4. Step 4: Simplify right side
    128,673x = 77,737,246,596
  5. Step 5: Solve for x
    x = 77,737,246,596/128,673
  6. Step 6: Final answer
    x = 604,145.75

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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.