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Finding the Fourth Proportional to 255.64, 381.72 and 222.52

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Solution

The fourth proportional to 255.64, 381.72 and 222.52 is: 332.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.64 : 381.72 = 222.52 : x
  2. Step 2: Convert to fraction form
    255.64/381.72 = 222.52/x
  3. Step 3: Cross multiply
    255.64x = 381.72 × 222.52
  4. Step 4: Simplify right side
    255.64x = 84,940.33
  5. Step 5: Solve for x
    x = 84,940.33/255.64
  6. Step 6: Final answer
    x = 332.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.