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Finding the Fourth Proportional to 579.15, 868.59 and 254.61

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Solution

The fourth proportional to 579.15, 868.59 and 254.61 is: 381.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.15 : 868.59 = 254.61 : x
  2. Step 2: Convert to fraction form
    579.15/868.59 = 254.61/x
  3. Step 3: Cross multiply
    579.15x = 868.59 × 254.61
  4. Step 4: Simplify right side
    579.15x = 221,151.70
  5. Step 5: Solve for x
    x = 221,151.70/579.15
  6. Step 6: Final answer
    x = 381.86

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