Finding the Fourth Proportional to 281.97, 422.97 and 86.99
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Solution
The fourth proportional to 281.97, 422.97 and 86.99 is: 130.48
Step by Step Solution
- Step 1: Write the proportion equation
281.97 : 422.97 = 86.99 : x - Step 2: Convert to fraction form
281.97/422.97 = 86.99/x - Step 3: Cross multiply
281.97x = 422.97 × 86.99 - Step 4: Simplify right side
281.97x = 36,792.05 - Step 5: Solve for x
x = 36,792.05/281.97 - Step 6: Final answer
x = 130.48
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Double scale
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Similar ratio
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1.5x scale
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.