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Finding the Fourth Proportional to 234.57, 323.70 and 131.07

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Solution

The fourth proportional to 234.57, 323.70 and 131.07 is: 180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.57 : 323.70 = 131.07 : x
  2. Step 2: Convert to fraction form
    234.57/323.70 = 131.07/x
  3. Step 3: Cross multiply
    234.57x = 323.70 × 131.07
  4. Step 4: Simplify right side
    234.57x = 42,427.36
  5. Step 5: Solve for x
    x = 42,427.36/234.57
  6. Step 6: Final answer
    x = 180.87

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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.