Home / 2,786.87-4,180.34-1,325.72

Finding the Fourth Proportional to 2,786.87, 4,180.34 and 1,325.72

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Solution

The fourth proportional to 2,786.87, 4,180.34 and 1,325.72 is: 1,988.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.87 : 4,180.34 = 1,325.72 : x
  2. Step 2: Convert to fraction form
    2,786.87/4,180.34 = 1,325.72/x
  3. Step 3: Cross multiply
    2,786.87x = 4,180.34 × 1,325.72
  4. Step 4: Simplify right side
    2,786.87x = 5,541,974.11
  5. Step 5: Solve for x
    x = 5,541,974.11/2,786.87
  6. Step 6: Final answer
    x = 1,988.61

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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.