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Finding the Fourth Proportional to 481.76, 664.79 and 274.76

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Solution

The fourth proportional to 481.76, 664.79 and 274.76 is: 379.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.76 : 664.79 = 274.76 : x
  2. Step 2: Convert to fraction form
    481.76/664.79 = 274.76/x
  3. Step 3: Cross multiply
    481.76x = 664.79 × 274.76
  4. Step 4: Simplify right side
    481.76x = 182,657.70
  5. Step 5: Solve for x
    x = 182,657.70/481.76
  6. Step 6: Final answer
    x = 379.15

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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.