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Finding the Fourth Proportional to 481.32, 720.54 and 408.60

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Solution

The fourth proportional to 481.32, 720.54 and 408.60 is: 611.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.32 : 720.54 = 408.60 : x
  2. Step 2: Convert to fraction form
    481.32/720.54 = 408.60/x
  3. Step 3: Cross multiply
    481.32x = 720.54 × 408.60
  4. Step 4: Simplify right side
    481.32x = 294,412.64
  5. Step 5: Solve for x
    x = 294,412.64/481.32
  6. Step 6: Final answer
    x = 611.68

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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.