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Finding the Fourth Proportional to 255.27, 382.53 and 145.38

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Solution

The fourth proportional to 255.27, 382.53 and 145.38 is: 217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.27 : 382.53 = 145.38 : x
  2. Step 2: Convert to fraction form
    255.27/382.53 = 145.38/x
  3. Step 3: Cross multiply
    255.27x = 382.53 × 145.38
  4. Step 4: Simplify right side
    255.27x = 55,610.30
  5. Step 5: Solve for x
    x = 55,610.30/255.27
  6. Step 6: Final answer
    x = 217.85

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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.