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Finding the Fourth Proportional to 519.81, 717.38 and 323.28

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Solution

The fourth proportional to 519.81, 717.38 and 323.28 is: 446.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.81 : 717.38 = 323.28 : x
  2. Step 2: Convert to fraction form
    519.81/717.38 = 323.28/x
  3. Step 3: Cross multiply
    519.81x = 717.38 × 323.28
  4. Step 4: Simplify right side
    519.81x = 231,914.61
  5. Step 5: Solve for x
    x = 231,914.61/519.81
  6. Step 6: Final answer
    x = 446.15

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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.