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Finding the Fourth Proportional to 143.22, 213.58 and 133.50

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Solution

The fourth proportional to 143.22, 213.58 and 133.50 is: 199.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.22 : 213.58 = 133.50 : x
  2. Step 2: Convert to fraction form
    143.22/213.58 = 133.50/x
  3. Step 3: Cross multiply
    143.22x = 213.58 × 133.50
  4. Step 4: Simplify right side
    143.22x = 28,512.93
  5. Step 5: Solve for x
    x = 28,512.93/143.22
  6. Step 6: Final answer
    x = 199.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.