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Finding the Fourth Proportional to 318.24, 439.04 and 193.92

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Solution

The fourth proportional to 318.24, 439.04 and 193.92 is: 267.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.24 : 439.04 = 193.92 : x
  2. Step 2: Convert to fraction form
    318.24/439.04 = 193.92/x
  3. Step 3: Cross multiply
    318.24x = 439.04 × 193.92
  4. Step 4: Simplify right side
    318.24x = 85,138.64
  5. Step 5: Solve for x
    x = 85,138.64/318.24
  6. Step 6: Final answer
    x = 267.53

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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.