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Finding the Fourth Proportional to 579.12, 868.56 and 571.92

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Solution

The fourth proportional to 579.12, 868.56 and 571.92 is: 857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.12 : 868.56 = 571.92 : x
  2. Step 2: Convert to fraction form
    579.12/868.56 = 571.92/x
  3. Step 3: Cross multiply
    579.12x = 868.56 × 571.92
  4. Step 4: Simplify right side
    579.12x = 496,746.84
  5. Step 5: Solve for x
    x = 496,746.84/579.12
  6. Step 6: Final answer
    x = 857.76

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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.