Finding the Fourth Proportional to 203.80, 281.13 and 129.99
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Solution
The fourth proportional to 203.80, 281.13 and 129.99 is: 179.31
Step by Step Solution
- Step 1: Write the proportion equation
203.80 : 281.13 = 129.99 : x - Step 2: Convert to fraction form
203.80/281.13 = 129.99/x - Step 3: Cross multiply
203.80x = 281.13 × 129.99 - Step 4: Simplify right side
203.80x = 36,543.44 - Step 5: Solve for x
x = 36,543.44/203.80 - Step 6: Final answer
x = 179.31
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.