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Finding the Fourth Proportional to 1,242.26, 1,863.33 and 754.28

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Solution

The fourth proportional to 1,242.26, 1,863.33 and 754.28 is: 1,131.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.26 : 1,863.33 = 754.28 : x
  2. Step 2: Convert to fraction form
    1,242.26/1,863.33 = 754.28/x
  3. Step 3: Cross multiply
    1,242.26x = 1,863.33 × 754.28
  4. Step 4: Simplify right side
    1,242.26x = 1,405,467.39
  5. Step 5: Solve for x
    x = 1,405,467.39/1,242.26
  6. Step 6: Final answer
    x = 1,131.38

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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.