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Finding the Fourth Proportional to 256.05, 352.56 and 224.79

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Solution

The fourth proportional to 256.05, 352.56 and 224.79 is: 309.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.05 : 352.56 = 224.79 : x
  2. Step 2: Convert to fraction form
    256.05/352.56 = 224.79/x
  3. Step 3: Cross multiply
    256.05x = 352.56 × 224.79
  4. Step 4: Simplify right side
    256.05x = 79,251.96
  5. Step 5: Solve for x
    x = 79,251.96/256.05
  6. Step 6: Final answer
    x = 309.52

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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.