Home / 3,983.85-5,974.83-1,386.72

Finding the Fourth Proportional to 3,983.85, 5,974.83 and 1,386.72

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Solution

The fourth proportional to 3,983.85, 5,974.83 and 1,386.72 is: 2,079.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,983.85 : 5,974.83 = 1,386.72 : x
  2. Step 2: Convert to fraction form
    3,983.85/5,974.83 = 1,386.72/x
  3. Step 3: Cross multiply
    3,983.85x = 5,974.83 × 1,386.72
  4. Step 4: Simplify right side
    3,983.85x = 8,285,416.26
  5. Step 5: Solve for x
    x = 8,285,416.26/3,983.85
  6. Step 6: Final answer
    x = 2,079.75

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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.