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Finding the Fourth Proportional to 439.90, 607.31 and 329.34

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Solution

The fourth proportional to 439.90, 607.31 and 329.34 is: 454.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.90 : 607.31 = 329.34 : x
  2. Step 2: Convert to fraction form
    439.90/607.31 = 329.34/x
  3. Step 3: Cross multiply
    439.90x = 607.31 × 329.34
  4. Step 4: Simplify right side
    439.90x = 200,006.79
  5. Step 5: Solve for x
    x = 200,006.79/439.90
  6. Step 6: Final answer
    x = 454.66

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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.