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Finding the Fourth Proportional to 325.54, 449.20 and 187.54

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Solution

The fourth proportional to 325.54, 449.20 and 187.54 is: 258.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.54 : 449.20 = 187.54 : x
  2. Step 2: Convert to fraction form
    325.54/449.20 = 187.54/x
  3. Step 3: Cross multiply
    325.54x = 449.20 × 187.54
  4. Step 4: Simplify right side
    325.54x = 84,242.97
  5. Step 5: Solve for x
    x = 84,242.97/325.54
  6. Step 6: Final answer
    x = 258.78

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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.