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Finding the Fourth Proportional to 834.58, 1,249.12 and 743.45

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Solution

The fourth proportional to 834.58, 1,249.12 and 743.45 is: 1,112.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.58 : 1,249.12 = 743.45 : x
  2. Step 2: Convert to fraction form
    834.58/1,249.12 = 743.45/x
  3. Step 3: Cross multiply
    834.58x = 1,249.12 × 743.45
  4. Step 4: Simplify right side
    834.58x = 928,658.26
  5. Step 5: Solve for x
    x = 928,658.26/834.58
  6. Step 6: Final answer
    x = 1,112.73

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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.