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Finding the Fourth Proportional to 2,081.52, 3,122.44 and 620.76

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Solution

The fourth proportional to 2,081.52, 3,122.44 and 620.76 is: 931.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.52 : 3,122.44 = 620.76 : x
  2. Step 2: Convert to fraction form
    2,081.52/3,122.44 = 620.76/x
  3. Step 3: Cross multiply
    2,081.52x = 3,122.44 × 620.76
  4. Step 4: Simplify right side
    2,081.52x = 1,938,285.85
  5. Step 5: Solve for x
    x = 1,938,285.85/2,081.52
  6. Step 6: Final answer
    x = 931.19

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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.