Home / 2,081.28-3,121.96-620.48

Finding the Fourth Proportional to 2,081.28, 3,121.96 and 620.48

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Solution

The fourth proportional to 2,081.28, 3,121.96 and 620.48 is: 930.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.28 : 3,121.96 = 620.48 : x
  2. Step 2: Convert to fraction form
    2,081.28/3,121.96 = 620.48/x
  3. Step 3: Cross multiply
    2,081.28x = 3,121.96 × 620.48
  4. Step 4: Simplify right side
    2,081.28x = 1,937,113.74
  5. Step 5: Solve for x
    x = 1,937,113.74/2,081.28
  6. Step 6: Final answer
    x = 930.73

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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.