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Finding the Fourth Proportional to 318.41, 439.24 and 276.87

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Solution

The fourth proportional to 318.41, 439.24 and 276.87 is: 381.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.41 : 439.24 = 276.87 : x
  2. Step 2: Convert to fraction form
    318.41/439.24 = 276.87/x
  3. Step 3: Cross multiply
    318.41x = 439.24 × 276.87
  4. Step 4: Simplify right side
    318.41x = 121,612.38
  5. Step 5: Solve for x
    x = 121,612.38/318.41
  6. Step 6: Final answer
    x = 381.94

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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.