Finding the Fourth Proportional to 252.81, 378.96 and 98.70
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Solution
The fourth proportional to 252.81, 378.96 and 98.70 is: 147.95
Step by Step Solution
- Step 1: Write the proportion equation
252.81 : 378.96 = 98.70 : x - Step 2: Convert to fraction form
252.81/378.96 = 98.70/x - Step 3: Cross multiply
252.81x = 378.96 × 98.70 - Step 4: Simplify right side
252.81x = 37,403.35 - Step 5: Solve for x
x = 37,403.35/252.81 - Step 6: Final answer
x = 147.95
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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.