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Finding the Fourth Proportional to 239.85, 330.46 and 198.18

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Solution

The fourth proportional to 239.85, 330.46 and 198.18 is: 273.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.85 : 330.46 = 198.18 : x
  2. Step 2: Convert to fraction form
    239.85/330.46 = 198.18/x
  3. Step 3: Cross multiply
    239.85x = 330.46 × 198.18
  4. Step 4: Simplify right side
    239.85x = 65,490.07
  5. Step 5: Solve for x
    x = 65,490.07/239.85
  6. Step 6: Final answer
    x = 273.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.