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Finding the Fourth Proportional to 2,069.06, 3,101.63 and 820.49

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Solution

The fourth proportional to 2,069.06, 3,101.63 and 820.49 is: 1,229.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,069.06 : 3,101.63 = 820.49 : x
  2. Step 2: Convert to fraction form
    2,069.06/3,101.63 = 820.49/x
  3. Step 3: Cross multiply
    2,069.06x = 3,101.63 × 820.49
  4. Step 4: Simplify right side
    2,069.06x = 2,544,836.79
  5. Step 5: Solve for x
    x = 2,544,836.79/2,069.06
  6. Step 6: Final answer
    x = 1,229.95

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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.