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Finding the Fourth Proportional to 481.40, 720.86 and 441.31

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Solution

The fourth proportional to 481.40, 720.86 and 441.31 is: 660.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.40 : 720.86 = 441.31 : x
  2. Step 2: Convert to fraction form
    481.40/720.86 = 441.31/x
  3. Step 3: Cross multiply
    481.40x = 720.86 × 441.31
  4. Step 4: Simplify right side
    481.40x = 318,119.12
  5. Step 5: Solve for x
    x = 318,119.12/481.40
  6. Step 6: Final answer
    x = 660.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.