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Finding the Fourth Proportional to 519.58, 717.29 and 379.54

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Solution

The fourth proportional to 519.58, 717.29 and 379.54 is: 523.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.58 : 717.29 = 379.54 : x
  2. Step 2: Convert to fraction form
    519.58/717.29 = 379.54/x
  3. Step 3: Cross multiply
    519.58x = 717.29 × 379.54
  4. Step 4: Simplify right side
    519.58x = 272,240.25
  5. Step 5: Solve for x
    x = 272,240.25/519.58
  6. Step 6: Final answer
    x = 523.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.