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Finding the Fourth Proportional to 481.94, 665.18 and 285.56

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Solution

The fourth proportional to 481.94, 665.18 and 285.56 is: 394.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.94 : 665.18 = 285.56 : x
  2. Step 2: Convert to fraction form
    481.94/665.18 = 285.56/x
  3. Step 3: Cross multiply
    481.94x = 665.18 × 285.56
  4. Step 4: Simplify right side
    481.94x = 189,948.80
  5. Step 5: Solve for x
    x = 189,948.80/481.94
  6. Step 6: Final answer
    x = 394.13

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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.