Home / 2,187.15-3,278.70-725.51

Finding the Fourth Proportional to 2,187.15, 3,278.70 and 725.51

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Solution

The fourth proportional to 2,187.15, 3,278.70 and 725.51 is: 1,087.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.15 : 3,278.70 = 725.51 : x
  2. Step 2: Convert to fraction form
    2,187.15/3,278.70 = 725.51/x
  3. Step 3: Cross multiply
    2,187.15x = 3,278.70 × 725.51
  4. Step 4: Simplify right side
    2,187.15x = 2,378,713.24
  5. Step 5: Solve for x
    x = 2,378,713.24/2,187.15
  6. Step 6: Final answer
    x = 1,087.59

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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.