Finding the Fourth Proportional to 82.40, 123.48 and 30.99
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Solution
The fourth proportional to 82.40, 123.48 and 30.99 is: 46.44
Step by Step Solution
- Step 1: Write the proportion equation
82.40 : 123.48 = 30.99 : x - Step 2: Convert to fraction form
82.40/123.48 = 30.99/x - Step 3: Cross multiply
82.40x = 123.48 × 30.99 - Step 4: Simplify right side
82.40x = 3,826.30 - Step 5: Solve for x
x = 3,826.30/82.40 - Step 6: Final answer
x = 46.44
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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.