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Finding the Fourth Proportional to 579.26, 868.28 and 486.92

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Solution

The fourth proportional to 579.26, 868.28 and 486.92 is: 729.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.26 : 868.28 = 486.92 : x
  2. Step 2: Convert to fraction form
    579.26/868.28 = 486.92/x
  3. Step 3: Cross multiply
    579.26x = 868.28 × 486.92
  4. Step 4: Simplify right side
    579.26x = 422,776.12
  5. Step 5: Solve for x
    x = 422,776.12/579.26
  6. Step 6: Final answer
    x = 729.86

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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.