Finding the Fourth Proportional to 254.99, 382.55 and 81.70
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Solution
The fourth proportional to 254.99, 382.55 and 81.70 is: 122.56
Step by Step Solution
- Step 1: Write the proportion equation
254.99 : 382.55 = 81.70 : x - Step 2: Convert to fraction form
254.99/382.55 = 81.70/x - Step 3: Cross multiply
254.99x = 382.55 × 81.70 - Step 4: Simplify right side
254.99x = 31,252.97 - Step 5: Solve for x
x = 31,252.97/254.99 - Step 6: Final answer
x = 122.56
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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.