Home / 1,080.31-1,619.89-422.41

Finding the Fourth Proportional to 1,080.31, 1,619.89 and 422.41

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Solution

The fourth proportional to 1,080.31, 1,619.89 and 422.41 is: 633.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.31 : 1,619.89 = 422.41 : x
  2. Step 2: Convert to fraction form
    1,080.31/1,619.89 = 422.41/x
  3. Step 3: Cross multiply
    1,080.31x = 1,619.89 × 422.41
  4. Step 4: Simplify right side
    1,080.31x = 684,257.73
  5. Step 5: Solve for x
    x = 684,257.73/1,080.31
  6. Step 6: Final answer
    x = 633.39

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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.