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Finding the Fourth Proportional to 892.27, 1,231.25 and 538.25

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Solution

The fourth proportional to 892.27, 1,231.25 and 538.25 is: 742.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.27 : 1,231.25 = 538.25 : x
  2. Step 2: Convert to fraction form
    892.27/1,231.25 = 538.25/x
  3. Step 3: Cross multiply
    892.27x = 1,231.25 × 538.25
  4. Step 4: Simplify right side
    892.27x = 662,714.49
  5. Step 5: Solve for x
    x = 662,714.49/892.27
  6. Step 6: Final answer
    x = 742.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.