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Finding the Fourth Proportional to 579.48, 868.42 and 270.79

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Solution

The fourth proportional to 579.48, 868.42 and 270.79 is: 405.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.48 : 868.42 = 270.79 : x
  2. Step 2: Convert to fraction form
    579.48/868.42 = 270.79/x
  3. Step 3: Cross multiply
    579.48x = 868.42 × 270.79
  4. Step 4: Simplify right side
    579.48x = 235,162.50
  5. Step 5: Solve for x
    x = 235,162.50/579.48
  6. Step 6: Final answer
    x = 405.82

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Double scale
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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.