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Finding the Fourth Proportional to 382.56, 574.12 and 280.14

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Solution

The fourth proportional to 382.56, 574.12 and 280.14 is: 420.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.56 : 574.12 = 280.14 : x
  2. Step 2: Convert to fraction form
    382.56/574.12 = 280.14/x
  3. Step 3: Cross multiply
    382.56x = 574.12 × 280.14
  4. Step 4: Simplify right side
    382.56x = 160,833.98
  5. Step 5: Solve for x
    x = 160,833.98/382.56
  6. Step 6: Final answer
    x = 420.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.