Home / 2,090.60-3,136.38-629.78

Finding the Fourth Proportional to 2,090.60, 3,136.38 and 629.78

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Solution

The fourth proportional to 2,090.60, 3,136.38 and 629.78 is: 944.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.60 : 3,136.38 = 629.78 : x
  2. Step 2: Convert to fraction form
    2,090.60/3,136.38 = 629.78/x
  3. Step 3: Cross multiply
    2,090.60x = 3,136.38 × 629.78
  4. Step 4: Simplify right side
    2,090.60x = 1,975,229.40
  5. Step 5: Solve for x
    x = 1,975,229.40/2,090.60
  6. Step 6: Final answer
    x = 944.81

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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.