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Finding the Fourth Proportional to 255.96, 352.86 and 189.47

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Solution

The fourth proportional to 255.96, 352.86 and 189.47 is: 261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.96 : 352.86 = 189.47 : x
  2. Step 2: Convert to fraction form
    255.96/352.86 = 189.47/x
  3. Step 3: Cross multiply
    255.96x = 352.86 × 189.47
  4. Step 4: Simplify right side
    255.96x = 66,856.56
  5. Step 5: Solve for x
    x = 66,856.56/255.96
  6. Step 6: Final answer
    x = 261.20

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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.