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Finding the Fourth Proportional to 3,855.72, 5,783.58 and 2,213.31

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Solution

The fourth proportional to 3,855.72, 5,783.58 and 2,213.31 is: 3,319.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.72 : 5,783.58 = 2,213.31 : x
  2. Step 2: Convert to fraction form
    3,855.72/5,783.58 = 2,213.31/x
  3. Step 3: Cross multiply
    3,855.72x = 5,783.58 × 2,213.31
  4. Step 4: Simplify right side
    3,855.72x = 12,800,855.45
  5. Step 5: Solve for x
    x = 12,800,855.45/3,855.72
  6. Step 6: Final answer
    x = 3,319.97

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Similar ratio
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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.