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Finding the Fourth Proportional to 318.77, 439.68 and 194.44

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Solution

The fourth proportional to 318.77, 439.68 and 194.44 is: 268.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.77 : 439.68 = 194.44 : x
  2. Step 2: Convert to fraction form
    318.77/439.68 = 194.44/x
  3. Step 3: Cross multiply
    318.77x = 439.68 × 194.44
  4. Step 4: Simplify right side
    318.77x = 85,491.38
  5. Step 5: Solve for x
    x = 85,491.38/318.77
  6. Step 6: Final answer
    x = 268.19

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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.