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Finding the Fourth Proportional to 754.27, 1,131.69 and 388.82

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Solution

The fourth proportional to 754.27, 1,131.69 and 388.82 is: 583.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.27 : 1,131.69 = 388.82 : x
  2. Step 2: Convert to fraction form
    754.27/1,131.69 = 388.82/x
  3. Step 3: Cross multiply
    754.27x = 1,131.69 × 388.82
  4. Step 4: Simplify right side
    754.27x = 440,021.76
  5. Step 5: Solve for x
    x = 440,021.76/754.27
  6. Step 6: Final answer
    x = 583.38

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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.