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Finding the Fourth Proportional to 1,180.61, 1,769.16 and 789.27

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Solution

The fourth proportional to 1,180.61, 1,769.16 and 789.27 is: 1,182.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.61 : 1,769.16 = 789.27 : x
  2. Step 2: Convert to fraction form
    1,180.61/1,769.16 = 789.27/x
  3. Step 3: Cross multiply
    1,180.61x = 1,769.16 × 789.27
  4. Step 4: Simplify right side
    1,180.61x = 1,396,341.24
  5. Step 5: Solve for x
    x = 1,396,341.24/1,180.61
  6. Step 6: Final answer
    x = 1,182.73

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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.