Finding the Fourth Proportional to 328.08, 492.08 and 84.61
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Solution
The fourth proportional to 328.08, 492.08 and 84.61 is: 126.90
Step by Step Solution
- Step 1: Write the proportion equation
328.08 : 492.08 = 84.61 : x - Step 2: Convert to fraction form
328.08/492.08 = 84.61/x - Step 3: Cross multiply
328.08x = 492.08 × 84.61 - Step 4: Simplify right side
328.08x = 41,633.24 - Step 5: Solve for x
x = 41,633.24/328.08 - Step 6: Final answer
x = 126.90
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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.