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Finding the Fourth Proportional to 319.75, 479.35 and 127.27

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Solution

The fourth proportional to 319.75, 479.35 and 127.27 is: 190.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.75 : 479.35 = 127.27 : x
  2. Step 2: Convert to fraction form
    319.75/479.35 = 127.27/x
  3. Step 3: Cross multiply
    319.75x = 479.35 × 127.27
  4. Step 4: Simplify right side
    319.75x = 61,004.16
  5. Step 5: Solve for x
    x = 61,004.16/319.75
  6. Step 6: Final answer
    x = 190.79

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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.