Home / 3,439.36-5,161.20-1,387.36

Finding the Fourth Proportional to 3,439.36, 5,161.20 and 1,387.36

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Solution

The fourth proportional to 3,439.36, 5,161.20 and 1,387.36 is: 2,081.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.36 : 5,161.20 = 1,387.36 : x
  2. Step 2: Convert to fraction form
    3,439.36/5,161.20 = 1,387.36/x
  3. Step 3: Cross multiply
    3,439.36x = 5,161.20 × 1,387.36
  4. Step 4: Simplify right side
    3,439.36x = 7,160,442.43
  5. Step 5: Solve for x
    x = 7,160,442.43/3,439.36
  6. Step 6: Final answer
    x = 2,081.91

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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.