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Finding the Fourth Proportional to 272.65, 375.99 and 198.84

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Solution

The fourth proportional to 272.65, 375.99 and 198.84 is: 274.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.65 : 375.99 = 198.84 : x
  2. Step 2: Convert to fraction form
    272.65/375.99 = 198.84/x
  3. Step 3: Cross multiply
    272.65x = 375.99 × 198.84
  4. Step 4: Simplify right side
    272.65x = 74,761.85
  5. Step 5: Solve for x
    x = 74,761.85/272.65
  6. Step 6: Final answer
    x = 274.20

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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.