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Finding the Fourth Proportional to 255.54, 352.70 and 155.97

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Solution

The fourth proportional to 255.54, 352.70 and 155.97 is: 215.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.54 : 352.70 = 155.97 : x
  2. Step 2: Convert to fraction form
    255.54/352.70 = 155.97/x
  3. Step 3: Cross multiply
    255.54x = 352.70 × 155.97
  4. Step 4: Simplify right side
    255.54x = 55,010.72
  5. Step 5: Solve for x
    x = 55,010.72/255.54
  6. Step 6: Final answer
    x = 215.28

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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.