Finding the Fourth Proportional to 51.44, 77.11 and 20.99
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Solution
The fourth proportional to 51.44, 77.11 and 20.99 is: 31.46
Step by Step Solution
- Step 1: Write the proportion equation
51.44 : 77.11 = 20.99 : x - Step 2: Convert to fraction form
51.44/77.11 = 20.99/x - Step 3: Cross multiply
51.44x = 77.11 × 20.99 - Step 4: Simplify right side
51.44x = 1,618.15 - Step 5: Solve for x
x = 1,618.15/51.44 - Step 6: Final answer
x = 31.46
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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.