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Finding the Fourth Proportional to 579.17, 868.96 and 318.84

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Solution

The fourth proportional to 579.17, 868.96 and 318.84 is: 478.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.17 : 868.96 = 318.84 : x
  2. Step 2: Convert to fraction form
    579.17/868.96 = 318.84/x
  3. Step 3: Cross multiply
    579.17x = 868.96 × 318.84
  4. Step 4: Simplify right side
    579.17x = 277,059.21
  5. Step 5: Solve for x
    x = 277,059.21/579.17
  6. Step 6: Final answer
    x = 478.37

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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.