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Finding the Fourth Proportional to 256.59, 353.97 and 173.61

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Solution

The fourth proportional to 256.59, 353.97 and 173.61 is: 239.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.59 : 353.97 = 173.61 : x
  2. Step 2: Convert to fraction form
    256.59/353.97 = 173.61/x
  3. Step 3: Cross multiply
    256.59x = 353.97 × 173.61
  4. Step 4: Simplify right side
    256.59x = 61,452.73
  5. Step 5: Solve for x
    x = 61,452.73/256.59
  6. Step 6: Final answer
    x = 239.50

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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.