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Finding the Fourth Proportional to 892.31, 1,338.45 and 243.04

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Solution

The fourth proportional to 892.31, 1,338.45 and 243.04 is: 364.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.31 : 1,338.45 = 243.04 : x
  2. Step 2: Convert to fraction form
    892.31/1,338.45 = 243.04/x
  3. Step 3: Cross multiply
    892.31x = 1,338.45 × 243.04
  4. Step 4: Simplify right side
    892.31x = 325,293.54
  5. Step 5: Solve for x
    x = 325,293.54/892.31
  6. Step 6: Final answer
    x = 364.55

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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.