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Finding the Fourth Proportional to 234.56, 351.60 and 131.72

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Solution

The fourth proportional to 234.56, 351.60 and 131.72 is: 197.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.56 : 351.60 = 131.72 : x
  2. Step 2: Convert to fraction form
    234.56/351.60 = 131.72/x
  3. Step 3: Cross multiply
    234.56x = 351.60 × 131.72
  4. Step 4: Simplify right side
    234.56x = 46,312.75
  5. Step 5: Solve for x
    x = 46,312.75/234.56
  6. Step 6: Final answer
    x = 197.45

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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.