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Finding the Fourth Proportional to 212.41, 316.48 and 198.44

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Solution

The fourth proportional to 212.41, 316.48 and 198.44 is: 295.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.41 : 316.48 = 198.44 : x
  2. Step 2: Convert to fraction form
    212.41/316.48 = 198.44/x
  3. Step 3: Cross multiply
    212.41x = 316.48 × 198.44
  4. Step 4: Simplify right side
    212.41x = 62,802.29
  5. Step 5: Solve for x
    x = 62,802.29/212.41
  6. Step 6: Final answer
    x = 295.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.