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Finding the Fourth Proportional to 481.21, 664.02 and 282.11

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Solution

The fourth proportional to 481.21, 664.02 and 282.11 is: 389.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.21 : 664.02 = 282.11 : x
  2. Step 2: Convert to fraction form
    481.21/664.02 = 282.11/x
  3. Step 3: Cross multiply
    481.21x = 664.02 × 282.11
  4. Step 4: Simplify right side
    481.21x = 187,323.36
  5. Step 5: Solve for x
    x = 187,323.36/481.21
  6. Step 6: Final answer
    x = 389.28

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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.