Home / 2,081.27-3,121.54-694.45

Finding the Fourth Proportional to 2,081.27, 3,121.54 and 694.45

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Solution

The fourth proportional to 2,081.27, 3,121.54 and 694.45 is: 1,041.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.27 : 3,121.54 = 694.45 : x
  2. Step 2: Convert to fraction form
    2,081.27/3,121.54 = 694.45/x
  3. Step 3: Cross multiply
    2,081.27x = 3,121.54 × 694.45
  4. Step 4: Simplify right side
    2,081.27x = 2,167,753.45
  5. Step 5: Solve for x
    x = 2,167,753.45/2,081.27
  6. Step 6: Final answer
    x = 1,041.55

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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.