Home / 3,418.28-5,127.36-1,109.78

Finding the Fourth Proportional to 3,418.28, 5,127.36 and 1,109.78

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Solution

The fourth proportional to 3,418.28, 5,127.36 and 1,109.78 is: 1,664.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.28 : 5,127.36 = 1,109.78 : x
  2. Step 2: Convert to fraction form
    3,418.28/5,127.36 = 1,109.78/x
  3. Step 3: Cross multiply
    3,418.28x = 5,127.36 × 1,109.78
  4. Step 4: Simplify right side
    3,418.28x = 5,690,241.58
  5. Step 5: Solve for x
    x = 5,690,241.58/3,418.28
  6. Step 6: Final answer
    x = 1,664.65

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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.