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Finding the Fourth Proportional to 2,090.71, 3,136.12 and 629.87

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Solution

The fourth proportional to 2,090.71, 3,136.12 and 629.87 is: 944.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.71 : 3,136.12 = 629.87 : x
  2. Step 2: Convert to fraction form
    2,090.71/3,136.12 = 629.87/x
  3. Step 3: Cross multiply
    2,090.71x = 3,136.12 × 629.87
  4. Step 4: Simplify right side
    2,090.71x = 1,975,330.65
  5. Step 5: Solve for x
    x = 1,975,330.65/2,090.71
  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.