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Finding the Fourth Proportional to 481.03, 663.41 and 387.74

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Solution

The fourth proportional to 481.03, 663.41 and 387.74 is: 534.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.03 : 663.41 = 387.74 : x
  2. Step 2: Convert to fraction form
    481.03/663.41 = 387.74/x
  3. Step 3: Cross multiply
    481.03x = 663.41 × 387.74
  4. Step 4: Simplify right side
    481.03x = 257,233.22
  5. Step 5: Solve for x
    x = 257,233.22/481.03
  6. Step 6: Final answer
    x = 534.76

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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.