Home / 2,186.92-3,278.76-1,321.03

Finding the Fourth Proportional to 2,186.92, 3,278.76 and 1,321.03

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Solution

The fourth proportional to 2,186.92, 3,278.76 and 1,321.03 is: 1,980.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.92 : 3,278.76 = 1,321.03 : x
  2. Step 2: Convert to fraction form
    2,186.92/3,278.76 = 1,321.03/x
  3. Step 3: Cross multiply
    2,186.92x = 3,278.76 × 1,321.03
  4. Step 4: Simplify right side
    2,186.92x = 4,331,340.32
  5. Step 5: Solve for x
    x = 4,331,340.32/2,186.92
  6. Step 6: Final answer
    x = 1,980.57

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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.