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Finding the Fourth Proportional to 825.43, 1,238.24 and 305.33

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Solution

The fourth proportional to 825.43, 1,238.24 and 305.33 is: 458.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.43 : 1,238.24 = 305.33 : x
  2. Step 2: Convert to fraction form
    825.43/1,238.24 = 305.33/x
  3. Step 3: Cross multiply
    825.43x = 1,238.24 × 305.33
  4. Step 4: Simplify right side
    825.43x = 378,071.82
  5. Step 5: Solve for x
    x = 378,071.82/825.43
  6. Step 6: Final answer
    x = 458.03

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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.