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Finding the Fourth Proportional to 2,081.93, 3,122.30 and 620.73

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Solution

The fourth proportional to 2,081.93, 3,122.30 and 620.73 is: 930.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.93 : 3,122.30 = 620.73 : x
  2. Step 2: Convert to fraction form
    2,081.93/3,122.30 = 620.73/x
  3. Step 3: Cross multiply
    2,081.93x = 3,122.30 × 620.73
  4. Step 4: Simplify right side
    2,081.93x = 1,938,106.83
  5. Step 5: Solve for x
    x = 1,938,106.83/2,081.93
  6. Step 6: Final answer
    x = 930.92

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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.