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Finding the Fourth Proportional to 742.67, 1,112.47 and 449.25

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Solution

The fourth proportional to 742.67, 1,112.47 and 449.25 is: 672.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.67 : 1,112.47 = 449.25 : x
  2. Step 2: Convert to fraction form
    742.67/1,112.47 = 449.25/x
  3. Step 3: Cross multiply
    742.67x = 1,112.47 × 449.25
  4. Step 4: Simplify right side
    742.67x = 499,771.85
  5. Step 5: Solve for x
    x = 499,771.85/742.67
  6. Step 6: Final answer
    x = 672.94

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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.