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Finding the Fourth Proportional to 255.27, 352.31 and 144.72

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Solution

The fourth proportional to 255.27, 352.31 and 144.72 is: 199.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.27 : 352.31 = 144.72 : x
  2. Step 2: Convert to fraction form
    255.27/352.31 = 144.72/x
  3. Step 3: Cross multiply
    255.27x = 352.31 × 144.72
  4. Step 4: Simplify right side
    255.27x = 50,986.67
  5. Step 5: Solve for x
    x = 50,986.67/255.27
  6. Step 6: Final answer
    x = 199.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.