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Finding the Fourth Proportional to 3,800.79, 5,245.20 and 2,229.84

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Solution

The fourth proportional to 3,800.79, 5,245.20 and 2,229.84 is: 3,077.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,800.79 : 5,245.20 = 2,229.84 : x
  2. Step 2: Convert to fraction form
    3,800.79/5,245.20 = 2,229.84/x
  3. Step 3: Cross multiply
    3,800.79x = 5,245.20 × 2,229.84
  4. Step 4: Simplify right side
    3,800.79x = 11,695,956.77
  5. Step 5: Solve for x
    x = 11,695,956.77/3,800.79
  6. Step 6: Final answer
    x = 3,077.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.