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Finding the Fourth Proportional to 2,090.85, 3,136.20 and 996

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Solution

The fourth proportional to 2,090.85, 3,136.20 and 996 is: 1,493.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.85 : 3,136.20 = 996 : x
  2. Step 2: Convert to fraction form
    2,090.85/3,136.20 = 996/x
  3. Step 3: Cross multiply
    2,090.85x = 3,136.20 × 996
  4. Step 4: Simplify right side
    2,090.85x = 3,123,655.20
  5. Step 5: Solve for x
    x = 3,123,655.20/2,090.85
  6. Step 6: Final answer
    x = 1,493.96

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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.