Finding the Fourth Proportional to 252.38, 378.42 and 79.00
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Solution
The fourth proportional to 252.38, 378.42 and 79.00 is: 118.45
Step by Step Solution
- Step 1: Write the proportion equation
252.38 : 378.42 = 79.00 : x - Step 2: Convert to fraction form
252.38/378.42 = 79.00/x - Step 3: Cross multiply
252.38x = 378.42 × 79.00 - Step 4: Simplify right side
252.38x = 29,894.23 - Step 5: Solve for x
x = 29,894.23/252.38 - Step 6: Final answer
x = 118.45
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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.