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Finding the Fourth Proportional to 680.44, 939 and 414.88

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Solution

The fourth proportional to 680.44, 939 and 414.88 is: 572.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.44 : 939 = 414.88 : x
  2. Step 2: Convert to fraction form
    680.44/939 = 414.88/x
  3. Step 3: Cross multiply
    680.44x = 939 × 414.88
  4. Step 4: Simplify right side
    680.44x = 389,569.97
  5. Step 5: Solve for x
    x = 389,569.97/680.44
  6. Step 6: Final answer
    x = 572.53

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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.