Finding the Fourth Proportional to 272.60, 408.68 and 135.74
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Solution
The fourth proportional to 272.60, 408.68 and 135.74 is: 203.50
Step by Step Solution
- Step 1: Write the proportion equation
272.60 : 408.68 = 135.74 : x - Step 2: Convert to fraction form
272.60/408.68 = 135.74/x - Step 3: Cross multiply
272.60x = 408.68 × 135.74 - Step 4: Simplify right side
272.60x = 55,474.22 - Step 5: Solve for x
x = 55,474.22/272.60 - Step 6: Final answer
x = 203.50
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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.