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Finding the Fourth Proportional to 742.01, 1,112.24 and 254.79

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Solution

The fourth proportional to 742.01, 1,112.24 and 254.79 is: 381.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.01 : 1,112.24 = 254.79 : x
  2. Step 2: Convert to fraction form
    742.01/1,112.24 = 254.79/x
  3. Step 3: Cross multiply
    742.01x = 1,112.24 × 254.79
  4. Step 4: Simplify right side
    742.01x = 283,388.27
  5. Step 5: Solve for x
    x = 283,388.27/742.01
  6. Step 6: Final answer
    x = 381.92

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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.