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Finding the Fourth Proportional to 197.87, 297.05 and 121.06

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Solution

The fourth proportional to 197.87, 297.05 and 121.06 is: 181.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.87 : 297.05 = 121.06 : x
  2. Step 2: Convert to fraction form
    197.87/297.05 = 121.06/x
  3. Step 3: Cross multiply
    197.87x = 297.05 × 121.06
  4. Step 4: Simplify right side
    197.87x = 35,960.87
  5. Step 5: Solve for x
    x = 35,960.87/197.87
  6. Step 6: Final answer
    x = 181.74

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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.