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Finding the Fourth Proportional to 220,828.80, 331,243.20 and 198,019.20

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Solution

The fourth proportional to 220,828.80, 331,243.20 and 198,019.20 is: 297,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,828.80 : 331,243.20 = 198,019.20 : x
  2. Step 2: Convert to fraction form
    220,828.80/331,243.20 = 198,019.20/x
  3. Step 3: Cross multiply
    220,828.80x = 331,243.20 × 198,019.20
  4. Step 4: Simplify right side
    220,828.80x = 65,592,513,469.44
  5. Step 5: Solve for x
    x = 65,592,513,469.44/220,828.80
  6. Step 6: Final answer
    x = 297,028.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.