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Finding the Fourth Proportional to 255.62, 352.72 and 143.59

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Solution

The fourth proportional to 255.62, 352.72 and 143.59 is: 198.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.62 : 352.72 = 143.59 : x
  2. Step 2: Convert to fraction form
    255.62/352.72 = 143.59/x
  3. Step 3: Cross multiply
    255.62x = 352.72 × 143.59
  4. Step 4: Simplify right side
    255.62x = 50,644.58
  5. Step 5: Solve for x
    x = 50,644.58/255.62
  6. Step 6: Final answer
    x = 198.12

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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.