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Finding the Fourth Proportional to 1,231.78, 1,846.11 and 538.26

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Solution

The fourth proportional to 1,231.78, 1,846.11 and 538.26 is: 806.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.78 : 1,846.11 = 538.26 : x
  2. Step 2: Convert to fraction form
    1,231.78/1,846.11 = 538.26/x
  3. Step 3: Cross multiply
    1,231.78x = 1,846.11 × 538.26
  4. Step 4: Simplify right side
    1,231.78x = 993,687.17
  5. Step 5: Solve for x
    x = 993,687.17/1,231.78
  6. Step 6: Final answer
    x = 806.71

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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.