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Finding the Fourth Proportional to 490.14, 734.78 and 201.40

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Solution

The fourth proportional to 490.14, 734.78 and 201.40 is: 301.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.14 : 734.78 = 201.40 : x
  2. Step 2: Convert to fraction form
    490.14/734.78 = 201.40/x
  3. Step 3: Cross multiply
    490.14x = 734.78 × 201.40
  4. Step 4: Simplify right side
    490.14x = 147,984.69
  5. Step 5: Solve for x
    x = 147,984.69/490.14
  6. Step 6: Final answer
    x = 301.92

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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.