Finding the Fourth Proportional to 281.91, 422.95 and 135.70
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Solution
The fourth proportional to 281.91, 422.95 and 135.70 is: 203.59
Step by Step Solution
- Step 1: Write the proportion equation
281.91 : 422.95 = 135.70 : x - Step 2: Convert to fraction form
281.91/422.95 = 135.70/x - Step 3: Cross multiply
281.91x = 422.95 × 135.70 - Step 4: Simplify right side
281.91x = 57,393.98 - Step 5: Solve for x
x = 57,393.98/281.91 - Step 6: Final answer
x = 203.59
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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.