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Finding the Fourth Proportional to 234.48, 321.40 and 230.32

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Solution

The fourth proportional to 234.48, 321.40 and 230.32 is: 315.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.48 : 321.40 = 230.32 : x
  2. Step 2: Convert to fraction form
    234.48/321.40 = 230.32/x
  3. Step 3: Cross multiply
    234.48x = 321.40 × 230.32
  4. Step 4: Simplify right side
    234.48x = 74,024.85
  5. Step 5: Solve for x
    x = 74,024.85/234.48
  6. Step 6: Final answer
    x = 315.70

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.