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Finding the Fourth Proportional to 683.67, 1,025.57 and 196.79

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Solution

The fourth proportional to 683.67, 1,025.57 and 196.79 is: 295.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.67 : 1,025.57 = 196.79 : x
  2. Step 2: Convert to fraction form
    683.67/1,025.57 = 196.79/x
  3. Step 3: Cross multiply
    683.67x = 1,025.57 × 196.79
  4. Step 4: Simplify right side
    683.67x = 201,824.98
  5. Step 5: Solve for x
    x = 201,824.98/683.67
  6. Step 6: Final answer
    x = 295.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.