Finding the Fourth Proportional to 252.80, 378.91 and 98.65
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Solution
The fourth proportional to 252.80, 378.91 and 98.65 is: 147.86
Step by Step Solution
- Step 1: Write the proportion equation
252.80 : 378.91 = 98.65 : x - Step 2: Convert to fraction form
252.80/378.91 = 98.65/x - Step 3: Cross multiply
252.80x = 378.91 × 98.65 - Step 4: Simplify right side
252.80x = 37,377.08 - Step 5: Solve for x
x = 37,377.08/252.80 - Step 6: Final answer
x = 147.86
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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.