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Finding the Fourth Proportional to 481.87, 723.03 and 391.60

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Solution

The fourth proportional to 481.87, 723.03 and 391.60 is: 587.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.87 : 723.03 = 391.60 : x
  2. Step 2: Convert to fraction form
    481.87/723.03 = 391.60/x
  3. Step 3: Cross multiply
    481.87x = 723.03 × 391.60
  4. Step 4: Simplify right side
    481.87x = 283,138.55
  5. Step 5: Solve for x
    x = 283,138.55/481.87
  6. Step 6: Final answer
    x = 587.58

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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.