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Finding the Fourth Proportional to 359.11, 495.55 and 201.77

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Solution

The fourth proportional to 359.11, 495.55 and 201.77 is: 278.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.11 : 495.55 = 201.77 : x
  2. Step 2: Convert to fraction form
    359.11/495.55 = 201.77/x
  3. Step 3: Cross multiply
    359.11x = 495.55 × 201.77
  4. Step 4: Simplify right side
    359.11x = 99,983.64
  5. Step 5: Solve for x
    x = 99,983.64/359.11
  6. Step 6: Final answer
    x = 278.42

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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.