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Finding the Fourth Proportional to 319.33, 440.61 and 179.45

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Solution

The fourth proportional to 319.33, 440.61 and 179.45 is: 247.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.33 : 440.61 = 179.45 : x
  2. Step 2: Convert to fraction form
    319.33/440.61 = 179.45/x
  3. Step 3: Cross multiply
    319.33x = 440.61 × 179.45
  4. Step 4: Simplify right side
    319.33x = 79,067.46
  5. Step 5: Solve for x
    x = 79,067.46/319.33
  6. Step 6: Final answer
    x = 247.60

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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.