Finding the Fourth Proportional to 281.99, 422.91 and 135.74
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Solution
The fourth proportional to 281.99, 422.91 and 135.74 is: 203.57
Step by Step Solution
- Step 1: Write the proportion equation
281.99 : 422.91 = 135.74 : x - Step 2: Convert to fraction form
281.99/422.91 = 135.74/x - Step 3: Cross multiply
281.99x = 422.91 × 135.74 - Step 4: Simplify right side
281.99x = 57,405.80 - Step 5: Solve for x
x = 57,405.80/281.99 - Step 6: Final answer
x = 203.57
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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.