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Finding the Fourth Proportional to 255.52, 352.67 and 239.89

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Solution

The fourth proportional to 255.52, 352.67 and 239.89 is: 331.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.52 : 352.67 = 239.89 : x
  2. Step 2: Convert to fraction form
    255.52/352.67 = 239.89/x
  3. Step 3: Cross multiply
    255.52x = 352.67 × 239.89
  4. Step 4: Simplify right side
    255.52x = 84,600.81
  5. Step 5: Solve for x
    x = 84,600.81/255.52
  6. Step 6: Final answer
    x = 331.09

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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.