Home / 2,081.03-3,121.20-694.31

Finding the Fourth Proportional to 2,081.03, 3,121.20 and 694.31

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Solution

The fourth proportional to 2,081.03, 3,121.20 and 694.31 is: 1,041.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.03 : 3,121.20 = 694.31 : x
  2. Step 2: Convert to fraction form
    2,081.03/3,121.20 = 694.31/x
  3. Step 3: Cross multiply
    2,081.03x = 3,121.20 × 694.31
  4. Step 4: Simplify right side
    2,081.03x = 2,167,064.77
  5. Step 5: Solve for x
    x = 2,167,064.77/2,081.03
  6. Step 6: Final answer
    x = 1,041.34

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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.