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Finding the Fourth Proportional to 481.26, 663.90 and 382.80

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Solution

The fourth proportional to 481.26, 663.90 and 382.80 is: 528.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.26 : 663.90 = 382.80 : x
  2. Step 2: Convert to fraction form
    481.26/663.90 = 382.80/x
  3. Step 3: Cross multiply
    481.26x = 663.90 × 382.80
  4. Step 4: Simplify right side
    481.26x = 254,140.92
  5. Step 5: Solve for x
    x = 254,140.92/481.26
  6. Step 6: Final answer
    x = 528.07

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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.