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Finding the Fourth Proportional to 218.30, 300.36 and 213.44

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Solution

The fourth proportional to 218.30, 300.36 and 213.44 is: 293.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.30 : 300.36 = 213.44 : x
  2. Step 2: Convert to fraction form
    218.30/300.36 = 213.44/x
  3. Step 3: Cross multiply
    218.30x = 300.36 × 213.44
  4. Step 4: Simplify right side
    218.30x = 64,108.84
  5. Step 5: Solve for x
    x = 64,108.84/218.30
  6. Step 6: Final answer
    x = 293.67

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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.