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Finding the Fourth Proportional to 358.89, 495.21 and 211.50

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Solution

The fourth proportional to 358.89, 495.21 and 211.50 is: 291.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.89 : 495.21 = 211.50 : x
  2. Step 2: Convert to fraction form
    358.89/495.21 = 211.50/x
  3. Step 3: Cross multiply
    358.89x = 495.21 × 211.50
  4. Step 4: Simplify right side
    358.89x = 104,736.92
  5. Step 5: Solve for x
    x = 104,736.92/358.89
  6. Step 6: Final answer
    x = 291.84

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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.