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Finding the Fourth Proportional to 325.86, 449.47 and 238.38

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Solution

The fourth proportional to 325.86, 449.47 and 238.38 is: 328.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.86 : 449.47 = 238.38 : x
  2. Step 2: Convert to fraction form
    325.86/449.47 = 238.38/x
  3. Step 3: Cross multiply
    325.86x = 449.47 × 238.38
  4. Step 4: Simplify right side
    325.86x = 107,144.66
  5. Step 5: Solve for x
    x = 107,144.66/325.86
  6. Step 6: Final answer
    x = 328.81

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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.