Finding the Fourth Proportional to 252.58, 378.99 and 130.78
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Solution
The fourth proportional to 252.58, 378.99 and 130.78 is: 196.23
Step by Step Solution
- Step 1: Write the proportion equation
252.58 : 378.99 = 130.78 : x - Step 2: Convert to fraction form
252.58/378.99 = 130.78/x - Step 3: Cross multiply
252.58x = 378.99 × 130.78 - Step 4: Simplify right side
252.58x = 49,564.08 - Step 5: Solve for x
x = 49,564.08/252.58 - Step 6: Final answer
x = 196.23
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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.