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Finding the Fourth Proportional to 319.50, 440.90 and 179.61

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Solution

The fourth proportional to 319.50, 440.90 and 179.61 is: 247.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.50 : 440.90 = 179.61 : x
  2. Step 2: Convert to fraction form
    319.50/440.90 = 179.61/x
  3. Step 3: Cross multiply
    319.50x = 440.90 × 179.61
  4. Step 4: Simplify right side
    319.50x = 79,189.15
  5. Step 5: Solve for x
    x = 79,189.15/319.50
  6. Step 6: Final answer
    x = 247.86

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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.