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Finding the Fourth Proportional to 2,090.79, 3,134.97 and 629.55

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Solution

The fourth proportional to 2,090.79, 3,134.97 and 629.55 is: 943.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.79 : 3,134.97 = 629.55 : x
  2. Step 2: Convert to fraction form
    2,090.79/3,134.97 = 629.55/x
  3. Step 3: Cross multiply
    2,090.79x = 3,134.97 × 629.55
  4. Step 4: Simplify right side
    2,090.79x = 1,973,620.36
  5. Step 5: Solve for x
    x = 1,973,620.36/2,090.79
  6. Step 6: Final answer
    x = 943.96

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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.