Home / 1,213.28-1,818.24-443.36

Finding the Fourth Proportional to 1,213.28, 1,818.24 and 443.36

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Solution

The fourth proportional to 1,213.28, 1,818.24 and 443.36 is: 664.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.28 : 1,818.24 = 443.36 : x
  2. Step 2: Convert to fraction form
    1,213.28/1,818.24 = 443.36/x
  3. Step 3: Cross multiply
    1,213.28x = 1,818.24 × 443.36
  4. Step 4: Simplify right side
    1,213.28x = 806,134.89
  5. Step 5: Solve for x
    x = 806,134.89/1,213.28
  6. Step 6: Final answer
    x = 664.43

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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.