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Finding the Fourth Proportional to 360.05, 496.78 and 212.69

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Solution

The fourth proportional to 360.05, 496.78 and 212.69 is: 293.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.05 : 496.78 = 212.69 : x
  2. Step 2: Convert to fraction form
    360.05/496.78 = 212.69/x
  3. Step 3: Cross multiply
    360.05x = 496.78 × 212.69
  4. Step 4: Simplify right side
    360.05x = 105,660.85
  5. Step 5: Solve for x
    x = 105,660.85/360.05
  6. Step 6: Final answer
    x = 293.47

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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.