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Finding the Fourth Proportional to 1,168.73, 1,753.19 and 388.56

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Solution

The fourth proportional to 1,168.73, 1,753.19 and 388.56 is: 582.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.73 : 1,753.19 = 388.56 : x
  2. Step 2: Convert to fraction form
    1,168.73/1,753.19 = 388.56/x
  3. Step 3: Cross multiply
    1,168.73x = 1,753.19 × 388.56
  4. Step 4: Simplify right side
    1,168.73x = 681,217.56
  5. Step 5: Solve for x
    x = 681,217.56/1,168.73
  6. Step 6: Final answer
    x = 582.87

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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.