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Finding the Fourth Proportional to 1,241.38, 1,711.96 and 843.64

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Solution

The fourth proportional to 1,241.38, 1,711.96 and 843.64 is: 1,163.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.38 : 1,711.96 = 843.64 : x
  2. Step 2: Convert to fraction form
    1,241.38/1,711.96 = 843.64/x
  3. Step 3: Cross multiply
    1,241.38x = 1,711.96 × 843.64
  4. Step 4: Simplify right side
    1,241.38x = 1,444,269.37
  5. Step 5: Solve for x
    x = 1,444,269.37/1,241.38
  6. Step 6: Final answer
    x = 1,163.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.