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Finding the Fourth Proportional to 197.15, 295.51 and 105.65

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Solution

The fourth proportional to 197.15, 295.51 and 105.65 is: 158.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.15 : 295.51 = 105.65 : x
  2. Step 2: Convert to fraction form
    197.15/295.51 = 105.65/x
  3. Step 3: Cross multiply
    197.15x = 295.51 × 105.65
  4. Step 4: Simplify right side
    197.15x = 31,220.63
  5. Step 5: Solve for x
    x = 31,220.63/197.15
  6. Step 6: Final answer
    x = 158.36

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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.