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Finding the Fourth Proportional to 789.66, 1,183.38 and 627.66

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Solution

The fourth proportional to 789.66, 1,183.38 and 627.66 is: 940.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.66 : 1,183.38 = 627.66 : x
  2. Step 2: Convert to fraction form
    789.66/1,183.38 = 627.66/x
  3. Step 3: Cross multiply
    789.66x = 1,183.38 × 627.66
  4. Step 4: Simplify right side
    789.66x = 742,760.29
  5. Step 5: Solve for x
    x = 742,760.29/789.66
  6. Step 6: Final answer
    x = 940.61

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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.