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Finding the Fourth Proportional to 197.08, 295.72 and 143.42

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Solution

The fourth proportional to 197.08, 295.72 and 143.42 is: 215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.08 : 295.72 = 143.42 : x
  2. Step 2: Convert to fraction form
    197.08/295.72 = 143.42/x
  3. Step 3: Cross multiply
    197.08x = 295.72 × 143.42
  4. Step 4: Simplify right side
    197.08x = 42,410.33
  5. Step 5: Solve for x
    x = 42,410.33/197.08
  6. Step 6: Final answer
    x = 215.20

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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.