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Finding the Fourth Proportional to 286.88, 395.60 and 255.27

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Solution

The fourth proportional to 286.88, 395.60 and 255.27 is: 352.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.88 : 395.60 = 255.27 : x
  2. Step 2: Convert to fraction form
    286.88/395.60 = 255.27/x
  3. Step 3: Cross multiply
    286.88x = 395.60 × 255.27
  4. Step 4: Simplify right side
    286.88x = 100,984.81
  5. Step 5: Solve for x
    x = 100,984.81/286.88
  6. Step 6: Final answer
    x = 352.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.