Home / 1,372.28-1,893.92-1,040.18

Finding the Fourth Proportional to 1,372.28, 1,893.92 and 1,040.18

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Solution

The fourth proportional to 1,372.28, 1,893.92 and 1,040.18 is: 1,435.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.28 : 1,893.92 = 1,040.18 : x
  2. Step 2: Convert to fraction form
    1,372.28/1,893.92 = 1,040.18/x
  3. Step 3: Cross multiply
    1,372.28x = 1,893.92 × 1,040.18
  4. Step 4: Simplify right side
    1,372.28x = 1,970,003.04
  5. Step 5: Solve for x
    x = 1,970,003.04/1,372.28
  6. Step 6: Final answer
    x = 1,435.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.