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Finding the Fourth Proportional to 319.91, 480.17 and 198.41

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Solution

The fourth proportional to 319.91, 480.17 and 198.41 is: 297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.91 : 480.17 = 198.41 : x
  2. Step 2: Convert to fraction form
    319.91/480.17 = 198.41/x
  3. Step 3: Cross multiply
    319.91x = 480.17 × 198.41
  4. Step 4: Simplify right side
    319.91x = 95,270.53
  5. Step 5: Solve for x
    x = 95,270.53/319.91
  6. Step 6: Final answer
    x = 297.80

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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.