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Finding the Fourth Proportional to 519.31, 716.61 and 322.75

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Solution

The fourth proportional to 519.31, 716.61 and 322.75 is: 445.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.31 : 716.61 = 322.75 : x
  2. Step 2: Convert to fraction form
    519.31/716.61 = 322.75/x
  3. Step 3: Cross multiply
    519.31x = 716.61 × 322.75
  4. Step 4: Simplify right side
    519.31x = 231,285.88
  5. Step 5: Solve for x
    x = 231,285.88/519.31
  6. Step 6: Final answer
    x = 445.37

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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.