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Finding the Fourth Proportional to 519.76, 779.82 and 327.16

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Solution

The fourth proportional to 519.76, 779.82 and 327.16 is: 490.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.76 : 779.82 = 327.16 : x
  2. Step 2: Convert to fraction form
    519.76/779.82 = 327.16/x
  3. Step 3: Cross multiply
    519.76x = 779.82 × 327.16
  4. Step 4: Simplify right side
    519.76x = 255,125.91
  5. Step 5: Solve for x
    x = 255,125.91/519.76
  6. Step 6: Final answer
    x = 490.85

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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.