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Finding the Fourth Proportional to 579.66, 868.59 and 319.44

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Solution

The fourth proportional to 579.66, 868.59 and 319.44 is: 478.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.66 : 868.59 = 319.44 : x
  2. Step 2: Convert to fraction form
    579.66/868.59 = 319.44/x
  3. Step 3: Cross multiply
    579.66x = 868.59 × 319.44
  4. Step 4: Simplify right side
    579.66x = 277,462.39
  5. Step 5: Solve for x
    x = 277,462.39/579.66
  6. Step 6: Final answer
    x = 478.66

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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.