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Finding the Fourth Proportional to 255.95, 353.48 and 197.15

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Solution

The fourth proportional to 255.95, 353.48 and 197.15 is: 272.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.95 : 353.48 = 197.15 : x
  2. Step 2: Convert to fraction form
    255.95/353.48 = 197.15/x
  3. Step 3: Cross multiply
    255.95x = 353.48 × 197.15
  4. Step 4: Simplify right side
    255.95x = 69,687.60
  5. Step 5: Solve for x
    x = 69,687.60/255.95
  6. Step 6: Final answer
    x = 272.27

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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.