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Finding the Fourth Proportional to 3,899.21, 5,852.21 and 2,145.83

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Solution

The fourth proportional to 3,899.21, 5,852.21 and 2,145.83 is: 3,220.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.21 : 5,852.21 = 2,145.83 : x
  2. Step 2: Convert to fraction form
    3,899.21/5,852.21 = 2,145.83/x
  3. Step 3: Cross multiply
    3,899.21x = 5,852.21 × 2,145.83
  4. Step 4: Simplify right side
    3,899.21x = 12,557,807.79
  5. Step 5: Solve for x
    x = 12,557,807.79/3,899.21
  6. Step 6: Final answer
    x = 3,220.61

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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.