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Finding the Third Proportional to 198,935 and 407,061

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Solution

The third proportional to 198,935 and 407,061 is: 832,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,935 : 407,061 = 407,061 : x
  2. Step 2: Convert to fraction form
    198,935/407,061 = 407,061/x
  3. Step 3: Cross multiply
    198,935x = 407,061 × 407,061
  4. Step 4: Simplify right side
    198,935x = 165,698,657,721
  5. Step 5: Solve for x
    x = 165,698,657,721/198,935
  6. Step 6: Final answer
    x = 832,928.63

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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.