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Finding the Fourth Proportional to 256.07, 353.84 and 193.79

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Solution

The fourth proportional to 256.07, 353.84 and 193.79 is: 267.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.07 : 353.84 = 193.79 : x
  2. Step 2: Convert to fraction form
    256.07/353.84 = 193.79/x
  3. Step 3: Cross multiply
    256.07x = 353.84 × 193.79
  4. Step 4: Simplify right side
    256.07x = 68,568.88
  5. Step 5: Solve for x
    x = 68,568.88/256.07
  6. Step 6: Final answer
    x = 267.78

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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.