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Finding the Fourth Proportional to 255.15, 353.77 and 240.57

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Solution

The fourth proportional to 255.15, 353.77 and 240.57 is: 333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.15 : 353.77 = 240.57 : x
  2. Step 2: Convert to fraction form
    255.15/353.77 = 240.57/x
  3. Step 3: Cross multiply
    255.15x = 353.77 × 240.57
  4. Step 4: Simplify right side
    255.15x = 85,105.85
  5. Step 5: Solve for x
    x = 85,105.85/255.15
  6. Step 6: Final answer
    x = 333.55

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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.