Home / 2,186.15-3,278.88-725.31

Finding the Fourth Proportional to 2,186.15, 3,278.88 and 725.31

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Solution

The fourth proportional to 2,186.15, 3,278.88 and 725.31 is: 1,087.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.15 : 3,278.88 = 725.31 : x
  2. Step 2: Convert to fraction form
    2,186.15/3,278.88 = 725.31/x
  3. Step 3: Cross multiply
    2,186.15x = 3,278.88 × 725.31
  4. Step 4: Simplify right side
    2,186.15x = 2,378,204.45
  5. Step 5: Solve for x
    x = 2,378,204.45/2,186.15
  6. Step 6: Final answer
    x = 1,087.85

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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.