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Finding the Fourth Proportional to 318.14, 439.20 and 193.82

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Solution

The fourth proportional to 318.14, 439.20 and 193.82 is: 267.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.14 : 439.20 = 193.82 : x
  2. Step 2: Convert to fraction form
    318.14/439.20 = 193.82/x
  3. Step 3: Cross multiply
    318.14x = 439.20 × 193.82
  4. Step 4: Simplify right side
    318.14x = 85,126.84
  5. Step 5: Solve for x
    x = 85,126.84/318.14
  6. Step 6: Final answer
    x = 267.58

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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.