Home / 2,187.28-3,279.85-725.94

Finding the Fourth Proportional to 2,187.28, 3,279.85 and 725.94

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Solution

The fourth proportional to 2,187.28, 3,279.85 and 725.94 is: 1,088.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.28 : 3,279.85 = 725.94 : x
  2. Step 2: Convert to fraction form
    2,187.28/3,279.85 = 725.94/x
  3. Step 3: Cross multiply
    2,187.28x = 3,279.85 × 725.94
  4. Step 4: Simplify right side
    2,187.28x = 2,380,974.31
  5. Step 5: Solve for x
    x = 2,380,974.31/2,187.28
  6. Step 6: Final answer
    x = 1,088.55

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1.5x scale

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.