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Finding the Fourth Proportional to 325.78, 449.43 and 201.40

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Solution

The fourth proportional to 325.78, 449.43 and 201.40 is: 277.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.78 : 449.43 = 201.40 : x
  2. Step 2: Convert to fraction form
    325.78/449.43 = 201.40/x
  3. Step 3: Cross multiply
    325.78x = 449.43 × 201.40
  4. Step 4: Simplify right side
    325.78x = 90,515.20
  5. Step 5: Solve for x
    x = 90,515.20/325.78
  6. Step 6: Final answer
    x = 277.84

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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.