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Finding the Fourth Proportional to 640.25, 960.38 and 201.54

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Solution

The fourth proportional to 640.25, 960.38 and 201.54 is: 302.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.25 : 960.38 = 201.54 : x
  2. Step 2: Convert to fraction form
    640.25/960.38 = 201.54/x
  3. Step 3: Cross multiply
    640.25x = 960.38 × 201.54
  4. Step 4: Simplify right side
    640.25x = 193,554.25
  5. Step 5: Solve for x
    x = 193,554.25/640.25
  6. Step 6: Final answer
    x = 302.31

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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.