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Finding the Fourth Proportional to 2,135.31, 3,202.74 and 674.48

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Solution

The fourth proportional to 2,135.31, 3,202.74 and 674.48 is: 1,011.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.31 : 3,202.74 = 674.48 : x
  2. Step 2: Convert to fraction form
    2,135.31/3,202.74 = 674.48/x
  3. Step 3: Cross multiply
    2,135.31x = 3,202.74 × 674.48
  4. Step 4: Simplify right side
    2,135.31x = 2,160,168.06
  5. Step 5: Solve for x
    x = 2,160,168.06/2,135.31
  6. Step 6: Final answer
    x = 1,011.64

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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.