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Finding the Fourth Proportional to 393.08, 588.66 and 255.36

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Solution

The fourth proportional to 393.08, 588.66 and 255.36 is: 382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.08 : 588.66 = 255.36 : x
  2. Step 2: Convert to fraction form
    393.08/588.66 = 255.36/x
  3. Step 3: Cross multiply
    393.08x = 588.66 × 255.36
  4. Step 4: Simplify right side
    393.08x = 150,320.22
  5. Step 5: Solve for x
    x = 150,320.22/393.08
  6. Step 6: Final answer
    x = 382.42

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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.