Home / 1,039.20-1,558.38-422.82

Finding the Fourth Proportional to 1,039.20, 1,558.38 and 422.82

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Solution

The fourth proportional to 1,039.20, 1,558.38 and 422.82 is: 634.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.20 : 1,558.38 = 422.82 : x
  2. Step 2: Convert to fraction form
    1,039.20/1,558.38 = 422.82/x
  3. Step 3: Cross multiply
    1,039.20x = 1,558.38 × 422.82
  4. Step 4: Simplify right side
    1,039.20x = 658,914.23
  5. Step 5: Solve for x
    x = 658,914.23/1,039.20
  6. Step 6: Final answer
    x = 634.06

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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.