Finding the Fourth Proportional to 382.78, 528.26 and 216.99
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Solution
The fourth proportional to 382.78, 528.26 and 216.99 is: 299.46
Step by Step Solution
- Step 1: Write the proportion equation
382.78 : 528.26 = 216.99 : x - Step 2: Convert to fraction form
382.78/528.26 = 216.99/x - Step 3: Cross multiply
382.78x = 528.26 × 216.99 - Step 4: Simplify right side
382.78x = 114,627.14 - Step 5: Solve for x
x = 114,627.14/382.78 - Step 6: Final answer
x = 299.46
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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.