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Finding the Fourth Proportional to 299.59, 412.99 and 212.11

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Solution

The fourth proportional to 299.59, 412.99 and 212.11 is: 292.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.59 : 412.99 = 212.11 : x
  2. Step 2: Convert to fraction form
    299.59/412.99 = 212.11/x
  3. Step 3: Cross multiply
    299.59x = 412.99 × 212.11
  4. Step 4: Simplify right side
    299.59x = 87,597.75
  5. Step 5: Solve for x
    x = 87,597.75/299.59
  6. Step 6: Final answer
    x = 292.39

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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.