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Finding the Fourth Proportional to 325.76, 449.16 and 238.40

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Solution

The fourth proportional to 325.76, 449.16 and 238.40 is: 328.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.76 : 449.16 = 238.40 : x
  2. Step 2: Convert to fraction form
    325.76/449.16 = 238.40/x
  3. Step 3: Cross multiply
    325.76x = 449.16 × 238.40
  4. Step 4: Simplify right side
    325.76x = 107,079.74
  5. Step 5: Solve for x
    x = 107,079.74/325.76
  6. Step 6: Final answer
    x = 328.71

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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.