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Finding the Third Proportional to 311,941.75 and 638,634.25

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Solution

The third proportional to 311,941.75 and 638,634.25 is: 1,307,467.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,941.75 : 638,634.25 = 638,634.25 : x
  2. Step 2: Convert to fraction form
    311,941.75/638,634.25 = 638,634.25/x
  3. Step 3: Cross multiply
    311,941.75x = 638,634.25 × 638,634.25
  4. Step 4: Simplify right side
    311,941.75x = 407,853,705,273.06
  5. Step 5: Solve for x
    x = 407,853,705,273.06/311,941.75
  6. Step 6: Final answer
    x = 1,307,467.52

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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.