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Finding the Fourth Proportional to 358.87, 495.09 and 211.45

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Solution

The fourth proportional to 358.87, 495.09 and 211.45 is: 291.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.87 : 495.09 = 211.45 : x
  2. Step 2: Convert to fraction form
    358.87/495.09 = 211.45/x
  3. Step 3: Cross multiply
    358.87x = 495.09 × 211.45
  4. Step 4: Simplify right side
    358.87x = 104,686.78
  5. Step 5: Solve for x
    x = 104,686.78/358.87
  6. Step 6: Final answer
    x = 291.71

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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.