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Finding the Fourth Proportional to 3,893.88, 5,842.18 and 2,431.32

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Solution

The fourth proportional to 3,893.88, 5,842.18 and 2,431.32 is: 3,647.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.88 : 5,842.18 = 2,431.32 : x
  2. Step 2: Convert to fraction form
    3,893.88/5,842.18 = 2,431.32/x
  3. Step 3: Cross multiply
    3,893.88x = 5,842.18 × 2,431.32
  4. Step 4: Simplify right side
    3,893.88x = 14,204,212.12
  5. Step 5: Solve for x
    x = 14,204,212.12/3,893.88
  6. Step 6: Final answer
    x = 3,647.83

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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.