Finding the Fourth Proportional to 197.18, 295.74 and 81.64
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Solution
The fourth proportional to 197.18, 295.74 and 81.64 is: 122.45
Step by Step Solution
- Step 1: Write the proportion equation
197.18 : 295.74 = 81.64 : x - Step 2: Convert to fraction form
197.18/295.74 = 81.64/x - Step 3: Cross multiply
197.18x = 295.74 × 81.64 - Step 4: Simplify right side
197.18x = 24,144.21 - Step 5: Solve for x
x = 24,144.21/197.18 - Step 6: Final answer
x = 122.45
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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.