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Finding the Fourth Proportional to 230.72, 343.87 and 218.30

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Solution

The fourth proportional to 230.72, 343.87 and 218.30 is: 325.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.72 : 343.87 = 218.30 : x
  2. Step 2: Convert to fraction form
    230.72/343.87 = 218.30/x
  3. Step 3: Cross multiply
    230.72x = 343.87 × 218.30
  4. Step 4: Simplify right side
    230.72x = 75,064.56
  5. Step 5: Solve for x
    x = 75,064.56/230.72
  6. Step 6: Final answer
    x = 325.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.