Finding the Fourth Proportional to 272.13, 408.26 and 79.75
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Solution
The fourth proportional to 272.13, 408.26 and 79.75 is: 119.64
Step by Step Solution
- Step 1: Write the proportion equation
272.13 : 408.26 = 79.75 : x - Step 2: Convert to fraction form
272.13/408.26 = 79.75/x - Step 3: Cross multiply
272.13x = 408.26 × 79.75 - Step 4: Simplify right side
272.13x = 32,558.74 - Step 5: Solve for x
x = 32,558.74/272.13 - Step 6: Final answer
x = 119.64
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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.