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Finding the Fourth Proportional to 1,163.80, 1,741.38 and 889.48

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Solution

The fourth proportional to 1,163.80, 1,741.38 and 889.48 is: 1,330.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.80 : 1,741.38 = 889.48 : x
  2. Step 2: Convert to fraction form
    1,163.80/1,741.38 = 889.48/x
  3. Step 3: Cross multiply
    1,163.80x = 1,741.38 × 889.48
  4. Step 4: Simplify right side
    1,163.80x = 1,548,922.68
  5. Step 5: Solve for x
    x = 1,548,922.68/1,163.80
  6. Step 6: Final answer
    x = 1,330.92

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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.