Home / 2,081.36-3,121.28-620.56

Finding the Fourth Proportional to 2,081.36, 3,121.28 and 620.56

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Solution

The fourth proportional to 2,081.36, 3,121.28 and 620.56 is: 930.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.36 : 3,121.28 = 620.56 : x
  2. Step 2: Convert to fraction form
    2,081.36/3,121.28 = 620.56/x
  3. Step 3: Cross multiply
    2,081.36x = 3,121.28 × 620.56
  4. Step 4: Simplify right side
    2,081.36x = 1,936,941.52
  5. Step 5: Solve for x
    x = 1,936,941.52/2,081.36
  6. Step 6: Final answer
    x = 930.61

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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.