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Finding the Fourth Proportional to 3,930.43, 5,890.44 and 2,885.55

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Solution

The fourth proportional to 3,930.43, 5,890.44 and 2,885.55 is: 4,324.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.43 : 5,890.44 = 2,885.55 : x
  2. Step 2: Convert to fraction form
    3,930.43/5,890.44 = 2,885.55/x
  3. Step 3: Cross multiply
    3,930.43x = 5,890.44 × 2,885.55
  4. Step 4: Simplify right side
    3,930.43x = 16,997,129.99
  5. Step 5: Solve for x
    x = 16,997,129.99/3,930.43
  6. Step 6: Final answer
    x = 4,324.50

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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.