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Finding the Fourth Proportional to 579.21, 868.20 and 359.83

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Solution

The fourth proportional to 579.21, 868.20 and 359.83 is: 539.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.21 : 868.20 = 359.83 : x
  2. Step 2: Convert to fraction form
    579.21/868.20 = 359.83/x
  3. Step 3: Cross multiply
    579.21x = 868.20 × 359.83
  4. Step 4: Simplify right side
    579.21x = 312,404.41
  5. Step 5: Solve for x
    x = 312,404.41/579.21
  6. Step 6: Final answer
    x = 539.37

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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.