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Finding the Fourth Proportional to 229.00, 343.40 and 142.21

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Solution

The fourth proportional to 229.00, 343.40 and 142.21 is: 213.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.00 : 343.40 = 142.21 : x
  2. Step 2: Convert to fraction form
    229.00/343.40 = 142.21/x
  3. Step 3: Cross multiply
    229.00x = 343.40 × 142.21
  4. Step 4: Simplify right side
    229.00x = 48,833.10
  5. Step 5: Solve for x
    x = 48,833.10/229.00
  6. Step 6: Final answer
    x = 213.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.