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Finding the Fourth Proportional to 481.47, 664.43 and 274.47

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Solution

The fourth proportional to 481.47, 664.43 and 274.47 is: 378.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.47 : 664.43 = 274.47 : x
  2. Step 2: Convert to fraction form
    481.47/664.43 = 274.47/x
  3. Step 3: Cross multiply
    481.47x = 664.43 × 274.47
  4. Step 4: Simplify right side
    481.47x = 182,366.10
  5. Step 5: Solve for x
    x = 182,366.10/481.47
  6. Step 6: Final answer
    x = 378.77

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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.