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Finding the Fourth Proportional to 382.87, 574.68 and 279.84

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Solution

The fourth proportional to 382.87, 574.68 and 279.84 is: 420.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.87 : 574.68 = 279.84 : x
  2. Step 2: Convert to fraction form
    382.87/574.68 = 279.84/x
  3. Step 3: Cross multiply
    382.87x = 574.68 × 279.84
  4. Step 4: Simplify right side
    382.87x = 160,821.66
  5. Step 5: Solve for x
    x = 160,821.66/382.87
  6. Step 6: Final answer
    x = 420.04

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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.