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Finding the Fourth Proportional to 481.14, 660.96 and 393.66

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Solution

The fourth proportional to 481.14, 660.96 and 393.66 is: 540.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.14 : 660.96 = 393.66 : x
  2. Step 2: Convert to fraction form
    481.14/660.96 = 393.66/x
  3. Step 3: Cross multiply
    481.14x = 660.96 × 393.66
  4. Step 4: Simplify right side
    481.14x = 260,193.51
  5. Step 5: Solve for x
    x = 260,193.51/481.14
  6. Step 6: Final answer
    x = 540.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.