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Finding the Fourth Proportional to 439.80, 607.19 and 329.43

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Solution

The fourth proportional to 439.80, 607.19 and 329.43 is: 454.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.80 : 607.19 = 329.43 : x
  2. Step 2: Convert to fraction form
    439.80/607.19 = 329.43/x
  3. Step 3: Cross multiply
    439.80x = 607.19 × 329.43
  4. Step 4: Simplify right side
    439.80x = 200,024.95
  5. Step 5: Solve for x
    x = 200,024.95/439.80
  6. Step 6: Final answer
    x = 454.81

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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.