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Finding the Fourth Proportional to 680.66, 938.60 and 605.73

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Solution

The fourth proportional to 680.66, 938.60 and 605.73 is: 835.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.66 : 938.60 = 605.73 : x
  2. Step 2: Convert to fraction form
    680.66/938.60 = 605.73/x
  3. Step 3: Cross multiply
    680.66x = 938.60 × 605.73
  4. Step 4: Simplify right side
    680.66x = 568,538.18
  5. Step 5: Solve for x
    x = 568,538.18/680.66
  6. Step 6: Final answer
    x = 835.27

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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.