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Finding the Fourth Proportional to 519.10, 717.50 and 394.96

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Solution

The fourth proportional to 519.10, 717.50 and 394.96 is: 545.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.10 : 717.50 = 394.96 : x
  2. Step 2: Convert to fraction form
    519.10/717.50 = 394.96/x
  3. Step 3: Cross multiply
    519.10x = 717.50 × 394.96
  4. Step 4: Simplify right side
    519.10x = 283,383.80
  5. Step 5: Solve for x
    x = 283,383.80/519.10
  6. Step 6: Final answer
    x = 545.91

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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.