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Finding the Fourth Proportional to 1,247.44, 1,871.21 and 323.03

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Solution

The fourth proportional to 1,247.44, 1,871.21 and 323.03 is: 484.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.44 : 1,871.21 = 323.03 : x
  2. Step 2: Convert to fraction form
    1,247.44/1,871.21 = 323.03/x
  3. Step 3: Cross multiply
    1,247.44x = 1,871.21 × 323.03
  4. Step 4: Simplify right side
    1,247.44x = 604,456.97
  5. Step 5: Solve for x
    x = 604,456.97/1,247.44
  6. Step 6: Final answer
    x = 484.56

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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.