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Finding the Fourth Proportional to 3,900.88, 5,861.40 and 2,933.20

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Solution

The fourth proportional to 3,900.88, 5,861.40 and 2,933.20 is: 4,407.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.88 : 5,861.40 = 2,933.20 : x
  2. Step 2: Convert to fraction form
    3,900.88/5,861.40 = 2,933.20/x
  3. Step 3: Cross multiply
    3,900.88x = 5,861.40 × 2,933.20
  4. Step 4: Simplify right side
    3,900.88x = 17,192,658.48
  5. Step 5: Solve for x
    x = 17,192,658.48/3,900.88
  6. Step 6: Final answer
    x = 4,407.38

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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.