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Finding the Third Proportional to 198,324 and 407,208

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Solution

The third proportional to 198,324 and 407,208 is: 836,098.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,324 : 407,208 = 407,208 : x
  2. Step 2: Convert to fraction form
    198,324/407,208 = 407,208/x
  3. Step 3: Cross multiply
    198,324x = 407,208 × 407,208
  4. Step 4: Simplify right side
    198,324x = 165,818,355,264
  5. Step 5: Solve for x
    x = 165,818,355,264/198,324
  6. Step 6: Final answer
    x = 836,098.28

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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.