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Finding the Fourth Proportional to 359.21, 495.81 and 228.39

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Solution

The fourth proportional to 359.21, 495.81 and 228.39 is: 315.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.21 : 495.81 = 228.39 : x
  2. Step 2: Convert to fraction form
    359.21/495.81 = 228.39/x
  3. Step 3: Cross multiply
    359.21x = 495.81 × 228.39
  4. Step 4: Simplify right side
    359.21x = 113,238.05
  5. Step 5: Solve for x
    x = 113,238.05/359.21
  6. Step 6: Final answer
    x = 315.25

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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.