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Finding the Fourth Proportional to 271.37, 407.18 and 198.31

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Solution

The fourth proportional to 271.37, 407.18 and 198.31 is: 297.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.37 : 407.18 = 198.31 : x
  2. Step 2: Convert to fraction form
    271.37/407.18 = 198.31/x
  3. Step 3: Cross multiply
    271.37x = 407.18 × 198.31
  4. Step 4: Simplify right side
    271.37x = 80,747.87
  5. Step 5: Solve for x
    x = 80,747.87/271.37
  6. Step 6: Final answer
    x = 297.56

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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.