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Finding the Fourth Proportional to 319.08, 440.23 and 194.71

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Solution

The fourth proportional to 319.08, 440.23 and 194.71 is: 268.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.08 : 440.23 = 194.71 : x
  2. Step 2: Convert to fraction form
    319.08/440.23 = 194.71/x
  3. Step 3: Cross multiply
    319.08x = 440.23 × 194.71
  4. Step 4: Simplify right side
    319.08x = 85,716.21
  5. Step 5: Solve for x
    x = 85,716.21/319.08
  6. Step 6: Final answer
    x = 268.64

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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.