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Finding the Fourth Proportional to 300.60, 414.39 and 211.80

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Solution

The fourth proportional to 300.60, 414.39 and 211.80 is: 291.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.60 : 414.39 = 211.80 : x
  2. Step 2: Convert to fraction form
    300.60/414.39 = 211.80/x
  3. Step 3: Cross multiply
    300.60x = 414.39 × 211.80
  4. Step 4: Simplify right side
    300.60x = 87,767.80
  5. Step 5: Solve for x
    x = 87,767.80/300.60
  6. Step 6: Final answer
    x = 291.98

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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.