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Finding the Fourth Proportional to 892.68, 1,338.86 and 243.26

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Solution

The fourth proportional to 892.68, 1,338.86 and 243.26 is: 364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.68 : 1,338.86 = 243.26 : x
  2. Step 2: Convert to fraction form
    892.68/1,338.86 = 243.26/x
  3. Step 3: Cross multiply
    892.68x = 1,338.86 × 243.26
  4. Step 4: Simplify right side
    892.68x = 325,691.08
  5. Step 5: Solve for x
    x = 325,691.08/892.68
  6. Step 6: Final answer
    x = 364.85

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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.