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Finding the Fourth Proportional to 481.44, 664.56 and 274.56

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Solution

The fourth proportional to 481.44, 664.56 and 274.56 is: 378.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.44 : 664.56 = 274.56 : x
  2. Step 2: Convert to fraction form
    481.44/664.56 = 274.56/x
  3. Step 3: Cross multiply
    481.44x = 664.56 × 274.56
  4. Step 4: Simplify right side
    481.44x = 182,461.59
  5. Step 5: Solve for x
    x = 182,461.59/481.44
  6. Step 6: Final answer
    x = 378.99

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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.