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Finding the Fourth Proportional to 271.80, 374.86 and 198.60

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Solution

The fourth proportional to 271.80, 374.86 and 198.60 is: 273.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.80 : 374.86 = 198.60 : x
  2. Step 2: Convert to fraction form
    271.80/374.86 = 198.60/x
  3. Step 3: Cross multiply
    271.80x = 374.86 × 198.60
  4. Step 4: Simplify right side
    271.80x = 74,447.20
  5. Step 5: Solve for x
    x = 74,447.20/271.80
  6. Step 6: Final answer
    x = 273.90

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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.