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Finding the Fourth Proportional to 358.97, 495.31 and 201.61

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Solution

The fourth proportional to 358.97, 495.31 and 201.61 is: 278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.97 : 495.31 = 201.61 : x
  2. Step 2: Convert to fraction form
    358.97/495.31 = 201.61/x
  3. Step 3: Cross multiply
    358.97x = 495.31 × 201.61
  4. Step 4: Simplify right side
    358.97x = 99,859.45
  5. Step 5: Solve for x
    x = 99,859.45/358.97
  6. Step 6: Final answer
    x = 278.18

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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.