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Finding the Fourth Proportional to 255.96, 355.03 and 247.22

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Solution

The fourth proportional to 255.96, 355.03 and 247.22 is: 342.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.96 : 355.03 = 247.22 : x
  2. Step 2: Convert to fraction form
    255.96/355.03 = 247.22/x
  3. Step 3: Cross multiply
    255.96x = 355.03 × 247.22
  4. Step 4: Simplify right side
    255.96x = 87,770.52
  5. Step 5: Solve for x
    x = 87,770.52/255.96
  6. Step 6: Final answer
    x = 342.91

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.