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Finding the Fourth Proportional to 519.72, 717.18 and 286.83

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Solution

The fourth proportional to 519.72, 717.18 and 286.83 is: 395.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.72 : 717.18 = 286.83 : x
  2. Step 2: Convert to fraction form
    519.72/717.18 = 286.83/x
  3. Step 3: Cross multiply
    519.72x = 717.18 × 286.83
  4. Step 4: Simplify right side
    519.72x = 205,708.74
  5. Step 5: Solve for x
    x = 205,708.74/519.72
  6. Step 6: Final answer
    x = 395.81

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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.