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Finding the Fourth Proportional to 743.27, 1,113.90 and 449.54

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Solution

The fourth proportional to 743.27, 1,113.90 and 449.54 is: 673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.27 : 1,113.90 = 449.54 : x
  2. Step 2: Convert to fraction form
    743.27/1,113.90 = 449.54/x
  3. Step 3: Cross multiply
    743.27x = 1,113.90 × 449.54
  4. Step 4: Simplify right side
    743.27x = 500,737.04
  5. Step 5: Solve for x
    x = 500,737.04/743.27
  6. Step 6: Final answer
    x = 673.70

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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.