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Finding the Fourth Proportional to 231.22, 319.46 and 217.51

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Solution

The fourth proportional to 231.22, 319.46 and 217.51 is: 300.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.22 : 319.46 = 217.51 : x
  2. Step 2: Convert to fraction form
    231.22/319.46 = 217.51/x
  3. Step 3: Cross multiply
    231.22x = 319.46 × 217.51
  4. Step 4: Simplify right side
    231.22x = 69,485.74
  5. Step 5: Solve for x
    x = 69,485.74/231.22
  6. Step 6: Final answer
    x = 300.52

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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.