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Finding the Fourth Proportional to 234.40, 351.60 and 220.75

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Solution

The fourth proportional to 234.40, 351.60 and 220.75 is: 331.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.40 : 351.60 = 220.75 : x
  2. Step 2: Convert to fraction form
    234.40/351.60 = 220.75/x
  3. Step 3: Cross multiply
    234.40x = 351.60 × 220.75
  4. Step 4: Simplify right side
    234.40x = 77,615.70
  5. Step 5: Solve for x
    x = 77,615.70/234.40
  6. Step 6: Final answer
    x = 331.13

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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.