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Finding the Fourth Proportional to 519.05, 716.26 and 309.22

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Solution

The fourth proportional to 519.05, 716.26 and 309.22 is: 426.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.05 : 716.26 = 309.22 : x
  2. Step 2: Convert to fraction form
    519.05/716.26 = 309.22/x
  3. Step 3: Cross multiply
    519.05x = 716.26 × 309.22
  4. Step 4: Simplify right side
    519.05x = 221,481.92
  5. Step 5: Solve for x
    x = 221,481.92/519.05
  6. Step 6: Final answer
    x = 426.71

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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.