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Finding the Fourth Proportional to 3,761.90, 5,188.26 and 2,819.90

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Solution

The fourth proportional to 3,761.90, 5,188.26 and 2,819.90 is: 3,889.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.90 : 5,188.26 = 2,819.90 : x
  2. Step 2: Convert to fraction form
    3,761.90/5,188.26 = 2,819.90/x
  3. Step 3: Cross multiply
    3,761.90x = 5,188.26 × 2,819.90
  4. Step 4: Simplify right side
    3,761.90x = 14,630,348.43
  5. Step 5: Solve for x
    x = 14,630,348.43/3,761.90
  6. Step 6: Final answer
    x = 3,889.09

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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.