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Finding the Fourth Proportional to 481.95, 665.10 and 285.57

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Solution

The fourth proportional to 481.95, 665.10 and 285.57 is: 394.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.95 : 665.10 = 285.57 : x
  2. Step 2: Convert to fraction form
    481.95/665.10 = 285.57/x
  3. Step 3: Cross multiply
    481.95x = 665.10 × 285.57
  4. Step 4: Simplify right side
    481.95x = 189,932.61
  5. Step 5: Solve for x
    x = 189,932.61/481.95
  6. Step 6: Final answer
    x = 394.09

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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.