Finding the Fourth Proportional to 252.68, 378.90 and 115.76
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Solution
The fourth proportional to 252.68, 378.90 and 115.76 is: 173.59
Step by Step Solution
- Step 1: Write the proportion equation
252.68 : 378.90 = 115.76 : x - Step 2: Convert to fraction form
252.68/378.90 = 115.76/x - Step 3: Cross multiply
252.68x = 378.90 × 115.76 - Step 4: Simplify right side
252.68x = 43,862.41 - Step 5: Solve for x
x = 43,862.41/252.68 - Step 6: Final answer
x = 173.59
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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.