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Finding the Fourth Proportional to 196.90, 294.83 and 142.05

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Solution

The fourth proportional to 196.90, 294.83 and 142.05 is: 212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.90 : 294.83 = 142.05 : x
  2. Step 2: Convert to fraction form
    196.90/294.83 = 142.05/x
  3. Step 3: Cross multiply
    196.90x = 294.83 × 142.05
  4. Step 4: Simplify right side
    196.90x = 41,880.96
  5. Step 5: Solve for x
    x = 41,880.96/196.90
  6. Step 6: Final answer
    x = 212.70

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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.