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Finding the Fourth Proportional to 319.82, 441.17 and 188.81

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Solution

The fourth proportional to 319.82, 441.17 and 188.81 is: 260.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.82 : 441.17 = 188.81 : x
  2. Step 2: Convert to fraction form
    319.82/441.17 = 188.81/x
  3. Step 3: Cross multiply
    319.82x = 441.17 × 188.81
  4. Step 4: Simplify right side
    319.82x = 83,295.57
  5. Step 5: Solve for x
    x = 83,295.57/319.82
  6. Step 6: Final answer
    x = 260.44

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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.