Finding the Fourth Proportional to 252.99, 378.79 and 191.95
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Solution
The fourth proportional to 252.99, 378.79 and 191.95 is: 287.40
Step by Step Solution
- Step 1: Write the proportion equation
252.99 : 378.79 = 191.95 : x - Step 2: Convert to fraction form
252.99/378.79 = 191.95/x - Step 3: Cross multiply
252.99x = 378.79 × 191.95 - Step 4: Simplify right side
252.99x = 72,708.74 - Step 5: Solve for x
x = 72,708.74/252.99 - Step 6: Final answer
x = 287.40
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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.