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Finding the Fourth Proportional to 358.94, 495.21 and 211.54

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Solution

The fourth proportional to 358.94, 495.21 and 211.54 is: 291.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.94 : 495.21 = 211.54 : x
  2. Step 2: Convert to fraction form
    358.94/495.21 = 211.54/x
  3. Step 3: Cross multiply
    358.94x = 495.21 × 211.54
  4. Step 4: Simplify right side
    358.94x = 104,756.72
  5. Step 5: Solve for x
    x = 104,756.72/358.94
  6. Step 6: Final answer
    x = 291.85

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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.