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Finding the Fourth Proportional to 481.28, 664.20 and 274.28

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Solution

The fourth proportional to 481.28, 664.20 and 274.28 is: 378.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.28 : 664.20 = 274.28 : x
  2. Step 2: Convert to fraction form
    481.28/664.20 = 274.28/x
  3. Step 3: Cross multiply
    481.28x = 664.20 × 274.28
  4. Step 4: Simplify right side
    481.28x = 182,176.78
  5. Step 5: Solve for x
    x = 182,176.78/481.28
  6. Step 6: Final answer
    x = 378.53

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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.