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Finding the Fourth Proportional to 218.10, 300.23 and 190.43

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Solution

The fourth proportional to 218.10, 300.23 and 190.43 is: 262.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.10 : 300.23 = 190.43 : x
  2. Step 2: Convert to fraction form
    218.10/300.23 = 190.43/x
  3. Step 3: Cross multiply
    218.10x = 300.23 × 190.43
  4. Step 4: Simplify right side
    218.10x = 57,170.35
  5. Step 5: Solve for x
    x = 57,170.35/218.10
  6. Step 6: Final answer
    x = 262.13

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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.