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Finding the Fourth Proportional to 3,861.91, 5,792.87 and 940.20

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Solution

The fourth proportional to 3,861.91, 5,792.87 and 940.20 is: 1,410.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.91 : 5,792.87 = 940.20 : x
  2. Step 2: Convert to fraction form
    3,861.91/5,792.87 = 940.20/x
  3. Step 3: Cross multiply
    3,861.91x = 5,792.87 × 940.20
  4. Step 4: Simplify right side
    3,861.91x = 5,446,456.37
  5. Step 5: Solve for x
    x = 5,446,456.37/3,861.91
  6. Step 6: Final answer
    x = 1,410.30

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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.