Home / 2,109.25-3,163.58-1,326.87

Finding the Fourth Proportional to 2,109.25, 3,163.58 and 1,326.87

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Solution

The fourth proportional to 2,109.25, 3,163.58 and 1,326.87 is: 1,990.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.25 : 3,163.58 = 1,326.87 : x
  2. Step 2: Convert to fraction form
    2,109.25/3,163.58 = 1,326.87/x
  3. Step 3: Cross multiply
    2,109.25x = 3,163.58 × 1,326.87
  4. Step 4: Simplify right side
    2,109.25x = 4,197,657.02
  5. Step 5: Solve for x
    x = 4,197,657.02/2,109.25
  6. Step 6: Final answer
    x = 1,990.12

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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.