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Finding the Fourth Proportional to 2,819.48, 4,229.66 and 871.22

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Solution

The fourth proportional to 2,819.48, 4,229.66 and 871.22 is: 1,306.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.48 : 4,229.66 = 871.22 : x
  2. Step 2: Convert to fraction form
    2,819.48/4,229.66 = 871.22/x
  3. Step 3: Cross multiply
    2,819.48x = 4,229.66 × 871.22
  4. Step 4: Simplify right side
    2,819.48x = 3,684,964.39
  5. Step 5: Solve for x
    x = 3,684,964.39/2,819.48
  6. Step 6: Final answer
    x = 1,306.97

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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.