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Finding the Fourth Proportional to 299.38, 413 and 201.28

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Solution

The fourth proportional to 299.38, 413 and 201.28 is: 277.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.38 : 413 = 201.28 : x
  2. Step 2: Convert to fraction form
    299.38/413 = 201.28/x
  3. Step 3: Cross multiply
    299.38x = 413 × 201.28
  4. Step 4: Simplify right side
    299.38x = 83,128.64
  5. Step 5: Solve for x
    x = 83,128.64/299.38
  6. Step 6: Final answer
    x = 277.67

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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.