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Finding the Fourth Proportional to 216.69, 299.06 and 161.34

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Solution

The fourth proportional to 216.69, 299.06 and 161.34 is: 222.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.69 : 299.06 = 161.34 : x
  2. Step 2: Convert to fraction form
    216.69/299.06 = 161.34/x
  3. Step 3: Cross multiply
    216.69x = 299.06 × 161.34
  4. Step 4: Simplify right side
    216.69x = 48,250.34
  5. Step 5: Solve for x
    x = 48,250.34/216.69
  6. Step 6: Final answer
    x = 222.67

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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.