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Finding the Fourth Proportional to 214.75, 323.42 and 190.68

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Solution

The fourth proportional to 214.75, 323.42 and 190.68 is: 287.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.75 : 323.42 = 190.68 : x
  2. Step 2: Convert to fraction form
    214.75/323.42 = 190.68/x
  3. Step 3: Cross multiply
    214.75x = 323.42 × 190.68
  4. Step 4: Simplify right side
    214.75x = 61,669.73
  5. Step 5: Solve for x
    x = 61,669.73/214.75
  6. Step 6: Final answer
    x = 287.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.