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Finding the Fourth Proportional to 319.16, 440.42 and 179.28

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Solution

The fourth proportional to 319.16, 440.42 and 179.28 is: 247.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.16 : 440.42 = 179.28 : x
  2. Step 2: Convert to fraction form
    319.16/440.42 = 179.28/x
  3. Step 3: Cross multiply
    319.16x = 440.42 × 179.28
  4. Step 4: Simplify right side
    319.16x = 78,958.50
  5. Step 5: Solve for x
    x = 78,958.50/319.16
  6. Step 6: Final answer
    x = 247.39

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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.