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Finding the Fourth Proportional to 358.90, 495.38 and 211.48

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Solution

The fourth proportional to 358.90, 495.38 and 211.48 is: 291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.90 : 495.38 = 211.48 : x
  2. Step 2: Convert to fraction form
    358.90/495.38 = 211.48/x
  3. Step 3: Cross multiply
    358.90x = 495.38 × 211.48
  4. Step 4: Simplify right side
    358.90x = 104,762.25
  5. Step 5: Solve for x
    x = 104,762.25/358.90
  6. Step 6: Final answer
    x = 291.90

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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.