Finding the Fourth Proportional to 154.45, 213.08 and 126.81
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Solution
The fourth proportional to 154.45, 213.08 and 126.81 is: 174.95
Step by Step Solution
- Step 1: Write the proportion equation
154.45 : 213.08 = 126.81 : x - Step 2: Convert to fraction form
154.45/213.08 = 126.81/x - Step 3: Cross multiply
154.45x = 213.08 × 126.81 - Step 4: Simplify right side
154.45x = 27,020.99 - Step 5: Solve for x
x = 27,020.99/154.45 - Step 6: Final answer
x = 174.95
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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.