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Finding the Fourth Proportional to 255.44, 382.80 and 133.64

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Solution

The fourth proportional to 255.44, 382.80 and 133.64 is: 200.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.44 : 382.80 = 133.64 : x
  2. Step 2: Convert to fraction form
    255.44/382.80 = 133.64/x
  3. Step 3: Cross multiply
    255.44x = 382.80 × 133.64
  4. Step 4: Simplify right side
    255.44x = 51,157.39
  5. Step 5: Solve for x
    x = 51,157.39/255.44
  6. Step 6: Final answer
    x = 200.27

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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.