Home / 2,081.15-3,121.67-620.31

Finding the Fourth Proportional to 2,081.15, 3,121.67 and 620.31

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Solution

The fourth proportional to 2,081.15, 3,121.67 and 620.31 is: 930.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.15 : 3,121.67 = 620.31 : x
  2. Step 2: Convert to fraction form
    2,081.15/3,121.67 = 620.31/x
  3. Step 3: Cross multiply
    2,081.15x = 3,121.67 × 620.31
  4. Step 4: Simplify right side
    2,081.15x = 1,936,400.02
  5. Step 5: Solve for x
    x = 1,936,400.02/2,081.15
  6. Step 6: Final answer
    x = 930.45

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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.