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Finding the Fourth Proportional to 230.27, 345.39 and 215.69

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Solution

The fourth proportional to 230.27, 345.39 and 215.69 is: 323.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.27 : 345.39 = 215.69 : x
  2. Step 2: Convert to fraction form
    230.27/345.39 = 215.69/x
  3. Step 3: Cross multiply
    230.27x = 345.39 × 215.69
  4. Step 4: Simplify right side
    230.27x = 74,495.44
  5. Step 5: Solve for x
    x = 74,495.44/230.27
  6. Step 6: Final answer
    x = 323.52

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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.