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Finding the Fourth Proportional to 481.56, 664.56 and 274.56

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Solution

The fourth proportional to 481.56, 664.56 and 274.56 is: 378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.56 : 664.56 = 274.56 : x
  2. Step 2: Convert to fraction form
    481.56/664.56 = 274.56/x
  3. Step 3: Cross multiply
    481.56x = 664.56 × 274.56
  4. Step 4: Simplify right side
    481.56x = 182,461.59
  5. Step 5: Solve for x
    x = 182,461.59/481.56
  6. Step 6: Final answer
    x = 378.90

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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.