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Finding the Fourth Proportional to 255.42, 383.13 and 109.22

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Solution

The fourth proportional to 255.42, 383.13 and 109.22 is: 163.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.42 : 383.13 = 109.22 : x
  2. Step 2: Convert to fraction form
    255.42/383.13 = 109.22/x
  3. Step 3: Cross multiply
    255.42x = 383.13 × 109.22
  4. Step 4: Simplify right side
    255.42x = 41,843.54
  5. Step 5: Solve for x
    x = 41,843.54/255.42
  6. Step 6: Final answer
    x = 163.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.