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Finding the Fourth Proportional to 455.52, 682.49 and 325.28

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Solution

The fourth proportional to 455.52, 682.49 and 325.28 is: 487.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.52 : 682.49 = 325.28 : x
  2. Step 2: Convert to fraction form
    455.52/682.49 = 325.28/x
  3. Step 3: Cross multiply
    455.52x = 682.49 × 325.28
  4. Step 4: Simplify right side
    455.52x = 222,002.87
  5. Step 5: Solve for x
    x = 222,002.87/455.52
  6. Step 6: Final answer
    x = 487.36

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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.