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Finding the Fourth Proportional to 255.68, 383.39 and 133.91

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Solution

The fourth proportional to 255.68, 383.39 and 133.91 is: 200.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.68 : 383.39 = 133.91 : x
  2. Step 2: Convert to fraction form
    255.68/383.39 = 133.91/x
  3. Step 3: Cross multiply
    255.68x = 383.39 × 133.91
  4. Step 4: Simplify right side
    255.68x = 51,338.17
  5. Step 5: Solve for x
    x = 51,338.17/255.68
  6. Step 6: Final answer
    x = 200.79

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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.