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Finding the Fourth Proportional to 481.50, 664.49 and 285.12

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Solution

The fourth proportional to 481.50, 664.49 and 285.12 is: 393.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.50 : 664.49 = 285.12 : x
  2. Step 2: Convert to fraction form
    481.50/664.49 = 285.12/x
  3. Step 3: Cross multiply
    481.50x = 664.49 × 285.12
  4. Step 4: Simplify right side
    481.50x = 189,459.39
  5. Step 5: Solve for x
    x = 189,459.39/481.50
  6. Step 6: Final answer
    x = 393.48

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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.