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Finding the Fourth Proportional to 439.98, 608.33 and 385.30

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Solution

The fourth proportional to 439.98, 608.33 and 385.30 is: 532.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.98 : 608.33 = 385.30 : x
  2. Step 2: Convert to fraction form
    439.98/608.33 = 385.30/x
  3. Step 3: Cross multiply
    439.98x = 608.33 × 385.30
  4. Step 4: Simplify right side
    439.98x = 234,387.62
  5. Step 5: Solve for x
    x = 234,387.62/439.98
  6. Step 6: Final answer
    x = 532.73

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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.