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Finding the Third Proportional to 198,828 and 418,176

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Solution

The third proportional to 198,828 and 418,176 is: 879,509.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,828 : 418,176 = 418,176 : x
  2. Step 2: Convert to fraction form
    198,828/418,176 = 418,176/x
  3. Step 3: Cross multiply
    198,828x = 418,176 × 418,176
  4. Step 4: Simplify right side
    198,828x = 174,871,166,976
  5. Step 5: Solve for x
    x = 174,871,166,976/198,828
  6. Step 6: Final answer
    x = 879,509.76

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.