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Finding the Fourth Proportional to 255.51, 382.44 and 133.61

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Solution

The fourth proportional to 255.51, 382.44 and 133.61 is: 199.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.51 : 382.44 = 133.61 : x
  2. Step 2: Convert to fraction form
    255.51/382.44 = 133.61/x
  3. Step 3: Cross multiply
    255.51x = 382.44 × 133.61
  4. Step 4: Simplify right side
    255.51x = 51,095.90
  5. Step 5: Solve for x
    x = 51,095.90/255.51
  6. Step 6: Final answer
    x = 199.98

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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.