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Finding the Fourth Proportional to 230.15, 344.55 and 216.80

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Solution

The fourth proportional to 230.15, 344.55 and 216.80 is: 324.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.15 : 344.55 = 216.80 : x
  2. Step 2: Convert to fraction form
    230.15/344.55 = 216.80/x
  3. Step 3: Cross multiply
    230.15x = 344.55 × 216.80
  4. Step 4: Simplify right side
    230.15x = 74,698.44
  5. Step 5: Solve for x
    x = 74,698.44/230.15
  6. Step 6: Final answer
    x = 324.56

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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.