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Finding the Fourth Proportional to 234.20, 323.20 and 130.70

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Solution

The fourth proportional to 234.20, 323.20 and 130.70 is: 180.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.20 : 323.20 = 130.70 : x
  2. Step 2: Convert to fraction form
    234.20/323.20 = 130.70/x
  3. Step 3: Cross multiply
    234.20x = 323.20 × 130.70
  4. Step 4: Simplify right side
    234.20x = 42,242.24
  5. Step 5: Solve for x
    x = 42,242.24/234.20
  6. Step 6: Final answer
    x = 180.37

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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.