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Finding the Third Proportional to 311,984.50 and 638,754.50

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Solution

The third proportional to 311,984.50 and 638,754.50 is: 1,307,780.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,984.50 : 638,754.50 = 638,754.50 : x
  2. Step 2: Convert to fraction form
    311,984.50/638,754.50 = 638,754.50/x
  3. Step 3: Cross multiply
    311,984.50x = 638,754.50 × 638,754.50
  4. Step 4: Simplify right side
    311,984.50x = 408,007,311,270.25
  5. Step 5: Solve for x
    x = 408,007,311,270.25/311,984.50
  6. Step 6: Final answer
    x = 1,307,780.71

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.