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Finding the Fourth Proportional to 579.79, 868.81 and 271.28

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Solution

The fourth proportional to 579.79, 868.81 and 271.28 is: 406.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.79 : 868.81 = 271.28 : x
  2. Step 2: Convert to fraction form
    579.79/868.81 = 271.28/x
  3. Step 3: Cross multiply
    579.79x = 868.81 × 271.28
  4. Step 4: Simplify right side
    579.79x = 235,685.75
  5. Step 5: Solve for x
    x = 235,685.75/579.79
  6. Step 6: Final answer
    x = 406.50

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.