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Finding the Third Proportional to 311,816 and 502,180

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Solution

The third proportional to 311,816 and 502,180 is: 808,761.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,816 : 502,180 = 502,180 : x
  2. Step 2: Convert to fraction form
    311,816/502,180 = 502,180/x
  3. Step 3: Cross multiply
    311,816x = 502,180 × 502,180
  4. Step 4: Simplify right side
    311,816x = 252,184,752,400
  5. Step 5: Solve for x
    x = 252,184,752,400/311,816
  6. Step 6: Final answer
    x = 808,761.42

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.