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Finding the Fourth Proportional to 255.62, 352.82 and 157.36

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Solution

The fourth proportional to 255.62, 352.82 and 157.36 is: 217.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.62 : 352.82 = 157.36 : x
  2. Step 2: Convert to fraction form
    255.62/352.82 = 157.36/x
  3. Step 3: Cross multiply
    255.62x = 352.82 × 157.36
  4. Step 4: Simplify right side
    255.62x = 55,519.76
  5. Step 5: Solve for x
    x = 55,519.76/255.62
  6. Step 6: Final answer
    x = 217.20

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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.