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Finding the Fourth Proportional to 319.44, 479.24 and 127.12

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Solution

The fourth proportional to 319.44, 479.24 and 127.12 is: 190.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.44 : 479.24 = 127.12 : x
  2. Step 2: Convert to fraction form
    319.44/479.24 = 127.12/x
  3. Step 3: Cross multiply
    319.44x = 479.24 × 127.12
  4. Step 4: Simplify right side
    319.44x = 60,920.99
  5. Step 5: Solve for x
    x = 60,920.99/319.44
  6. Step 6: Final answer
    x = 190.71

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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.