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Finding the Fourth Proportional to 319.74, 441.20 and 179.85

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Solution

The fourth proportional to 319.74, 441.20 and 179.85 is: 248.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.74 : 441.20 = 179.85 : x
  2. Step 2: Convert to fraction form
    319.74/441.20 = 179.85/x
  3. Step 3: Cross multiply
    319.74x = 441.20 × 179.85
  4. Step 4: Simplify right side
    319.74x = 79,350.91
  5. Step 5: Solve for x
    x = 79,350.91/319.74
  6. Step 6: Final answer
    x = 248.17

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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.