Finding the Fourth Proportional to 382.79, 528.12 and 216.99
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Solution
The fourth proportional to 382.79, 528.12 and 216.99 is: 299.38
Step by Step Solution
- Step 1: Write the proportion equation
382.79 : 528.12 = 216.99 : x - Step 2: Convert to fraction form
382.79/528.12 = 216.99/x - Step 3: Cross multiply
382.79x = 528.12 × 216.99 - Step 4: Simplify right side
382.79x = 114,596.76 - Step 5: Solve for x
x = 114,596.76/382.79 - Step 6: Final answer
x = 299.38
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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.