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Finding the Fourth Proportional to 208.14, 311.80 and 195.38

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Solution

The fourth proportional to 208.14, 311.80 and 195.38 is: 292.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.14 : 311.80 = 195.38 : x
  2. Step 2: Convert to fraction form
    208.14/311.80 = 195.38/x
  3. Step 3: Cross multiply
    208.14x = 311.80 × 195.38
  4. Step 4: Simplify right side
    208.14x = 60,919.48
  5. Step 5: Solve for x
    x = 60,919.48/208.14
  6. Step 6: Final answer
    x = 292.69

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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.