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Finding the Fourth Proportional to 271.08, 405.66 and 198.76

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Solution

The fourth proportional to 271.08, 405.66 and 198.76 is: 297.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.08 : 405.66 = 198.76 : x
  2. Step 2: Convert to fraction form
    271.08/405.66 = 198.76/x
  3. Step 3: Cross multiply
    271.08x = 405.66 × 198.76
  4. Step 4: Simplify right side
    271.08x = 80,628.98
  5. Step 5: Solve for x
    x = 80,628.98/271.08
  6. Step 6: Final answer
    x = 297.44

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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.