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Finding the Fourth Proportional to 2,135.09, 3,202.64 and 748.47

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Solution

The fourth proportional to 2,135.09, 3,202.64 and 748.47 is: 1,122.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.09 : 3,202.64 = 748.47 : x
  2. Step 2: Convert to fraction form
    2,135.09/3,202.64 = 748.47/x
  3. Step 3: Cross multiply
    2,135.09x = 3,202.64 × 748.47
  4. Step 4: Simplify right side
    2,135.09x = 2,397,076.22
  5. Step 5: Solve for x
    x = 2,397,076.22/2,135.09
  6. Step 6: Final answer
    x = 1,122.71

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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.