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Finding the Fourth Proportional to 519.52, 716.73 and 309.61

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Solution

The fourth proportional to 519.52, 716.73 and 309.61 is: 427.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.52 : 716.73 = 309.61 : x
  2. Step 2: Convert to fraction form
    519.52/716.73 = 309.61/x
  3. Step 3: Cross multiply
    519.52x = 716.73 × 309.61
  4. Step 4: Simplify right side
    519.52x = 221,906.78
  5. Step 5: Solve for x
    x = 221,906.78/519.52
  6. Step 6: Final answer
    x = 427.14

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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.