Finding the Fourth Proportional to 188.39, 260.11 and 122.99
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Solution
The fourth proportional to 188.39, 260.11 and 122.99 is: 169.80
Step by Step Solution
- Step 1: Write the proportion equation
188.39 : 260.11 = 122.99 : x - Step 2: Convert to fraction form
188.39/260.11 = 122.99/x - Step 3: Cross multiply
188.39x = 260.11 × 122.99 - Step 4: Simplify right side
188.39x = 31,989.78 - Step 5: Solve for x
x = 31,989.78/188.39 - Step 6: Final answer
x = 169.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.