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Finding the Fourth Proportional to 217.31, 299.90 and 119.07

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Solution

The fourth proportional to 217.31, 299.90 and 119.07 is: 164.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.31 : 299.90 = 119.07 : x
  2. Step 2: Convert to fraction form
    217.31/299.90 = 119.07/x
  3. Step 3: Cross multiply
    217.31x = 299.90 × 119.07
  4. Step 4: Simplify right side
    217.31x = 35,709.09
  5. Step 5: Solve for x
    x = 35,709.09/217.31
  6. Step 6: Final answer
    x = 164.32

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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.