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Finding the Fourth Proportional to 217.92, 300.84 and 144.20

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Solution

The fourth proportional to 217.92, 300.84 and 144.20 is: 199.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.92 : 300.84 = 144.20 : x
  2. Step 2: Convert to fraction form
    217.92/300.84 = 144.20/x
  3. Step 3: Cross multiply
    217.92x = 300.84 × 144.20
  4. Step 4: Simplify right side
    217.92x = 43,381.13
  5. Step 5: Solve for x
    x = 43,381.13/217.92
  6. Step 6: Final answer
    x = 199.07

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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.