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Finding the Fourth Proportional to 325.43, 487.28 and 254.37

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Solution

The fourth proportional to 325.43, 487.28 and 254.37 is: 380.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.43 : 487.28 = 254.37 : x
  2. Step 2: Convert to fraction form
    325.43/487.28 = 254.37/x
  3. Step 3: Cross multiply
    325.43x = 487.28 × 254.37
  4. Step 4: Simplify right side
    325.43x = 123,946.69
  5. Step 5: Solve for x
    x = 123,946.69/325.43
  6. Step 6: Final answer
    x = 380.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.