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Finding the Fourth Proportional to 234.33, 351.39 and 90

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Solution

The fourth proportional to 234.33, 351.39 and 90 is: 134.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.33 : 351.39 = 90 : x
  2. Step 2: Convert to fraction form
    234.33/351.39 = 90/x
  3. Step 3: Cross multiply
    234.33x = 351.39 × 90
  4. Step 4: Simplify right side
    234.33x = 31,625.10
  5. Step 5: Solve for x
    x = 31,625.10/234.33
  6. Step 6: Final answer
    x = 134.96

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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.