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Finding the Fourth Proportional to 539.62, 744.62 and 329.90

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Solution

The fourth proportional to 539.62, 744.62 and 329.90 is: 455.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.62 : 744.62 = 329.90 : x
  2. Step 2: Convert to fraction form
    539.62/744.62 = 329.90/x
  3. Step 3: Cross multiply
    539.62x = 744.62 × 329.90
  4. Step 4: Simplify right side
    539.62x = 245,650.14
  5. Step 5: Solve for x
    x = 245,650.14/539.62
  6. Step 6: Final answer
    x = 455.23

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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.