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Finding the Fourth Proportional to 303.96, 419.50 and 171.21

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Solution

The fourth proportional to 303.96, 419.50 and 171.21 is: 236.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.96 : 419.50 = 171.21 : x
  2. Step 2: Convert to fraction form
    303.96/419.50 = 171.21/x
  3. Step 3: Cross multiply
    303.96x = 419.50 × 171.21
  4. Step 4: Simplify right side
    303.96x = 71,824.38
  5. Step 5: Solve for x
    x = 71,824.38/303.96
  6. Step 6: Final answer
    x = 236.29

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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.