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Finding the Fourth Proportional to 319.19, 440.39 and 194.83

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Solution

The fourth proportional to 319.19, 440.39 and 194.83 is: 268.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.19 : 440.39 = 194.83 : x
  2. Step 2: Convert to fraction form
    319.19/440.39 = 194.83/x
  3. Step 3: Cross multiply
    319.19x = 440.39 × 194.83
  4. Step 4: Simplify right side
    319.19x = 85,800.57
  5. Step 5: Solve for x
    x = 85,800.57/319.19
  6. Step 6: Final answer
    x = 268.81

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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.