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Finding the Fourth Proportional to 680.82, 939.25 and 445.04

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Solution

The fourth proportional to 680.82, 939.25 and 445.04 is: 613.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.82 : 939.25 = 445.04 : x
  2. Step 2: Convert to fraction form
    680.82/939.25 = 445.04/x
  3. Step 3: Cross multiply
    680.82x = 939.25 × 445.04
  4. Step 4: Simplify right side
    680.82x = 418,003.82
  5. Step 5: Solve for x
    x = 418,003.82/680.82
  6. Step 6: Final answer
    x = 613.97

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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.