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Finding the Fourth Proportional to 358.54, 494.84 and 211.21

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Solution

The fourth proportional to 358.54, 494.84 and 211.21 is: 291.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.54 : 494.84 = 211.21 : x
  2. Step 2: Convert to fraction form
    358.54/494.84 = 211.21/x
  3. Step 3: Cross multiply
    358.54x = 494.84 × 211.21
  4. Step 4: Simplify right side
    358.54x = 104,515.16
  5. Step 5: Solve for x
    x = 104,515.16/358.54
  6. Step 6: Final answer
    x = 291.50

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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.