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Finding the Fourth Proportional to 539.21, 743.91 and 329.31

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Solution

The fourth proportional to 539.21, 743.91 and 329.31 is: 454.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.21 : 743.91 = 329.31 : x
  2. Step 2: Convert to fraction form
    539.21/743.91 = 329.31/x
  3. Step 3: Cross multiply
    539.21x = 743.91 × 329.31
  4. Step 4: Simplify right side
    539.21x = 244,977.00
  5. Step 5: Solve for x
    x = 244,977.00/539.21
  6. Step 6: Final answer
    x = 454.33

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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.