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Finding the Fourth Proportional to 2,819.93, 4,229.91 and 739.80

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Solution

The fourth proportional to 2,819.93, 4,229.91 and 739.80 is: 1,109.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.93 : 4,229.91 = 739.80 : x
  2. Step 2: Convert to fraction form
    2,819.93/4,229.91 = 739.80/x
  3. Step 3: Cross multiply
    2,819.93x = 4,229.91 × 739.80
  4. Step 4: Simplify right side
    2,819.93x = 3,129,287.42
  5. Step 5: Solve for x
    x = 3,129,287.42/2,819.93
  6. Step 6: Final answer
    x = 1,109.71

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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.