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Finding the Fourth Proportional to 3,779.72, 5,671.20 and 2,133.80

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Solution

The fourth proportional to 3,779.72, 5,671.20 and 2,133.80 is: 3,201.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.72 : 5,671.20 = 2,133.80 : x
  2. Step 2: Convert to fraction form
    3,779.72/5,671.20 = 2,133.80/x
  3. Step 3: Cross multiply
    3,779.72x = 5,671.20 × 2,133.80
  4. Step 4: Simplify right side
    3,779.72x = 12,101,206.56
  5. Step 5: Solve for x
    x = 12,101,206.56/3,779.72
  6. Step 6: Final answer
    x = 3,201.61

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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.