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Finding the Fourth Proportional to 235.43, 352.94 and 89.09

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Solution

The fourth proportional to 235.43, 352.94 and 89.09 is: 133.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.43 : 352.94 = 89.09 : x
  2. Step 2: Convert to fraction form
    235.43/352.94 = 89.09/x
  3. Step 3: Cross multiply
    235.43x = 352.94 × 89.09
  4. Step 4: Simplify right side
    235.43x = 31,441.21
  5. Step 5: Solve for x
    x = 31,441.21/235.43
  6. Step 6: Final answer
    x = 133.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.