Finding the Fourth Proportional to 328.46, 492.68 and 84.99
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Solution
The fourth proportional to 328.46, 492.68 and 84.99 is: 127.48
Step by Step Solution
- Step 1: Write the proportion equation
328.46 : 492.68 = 84.99 : x - Step 2: Convert to fraction form
328.46/492.68 = 84.99/x - Step 3: Cross multiply
328.46x = 492.68 × 84.99 - Step 4: Simplify right side
328.46x = 41,871.24 - Step 5: Solve for x
x = 41,871.24/328.46 - Step 6: Final answer
x = 127.48
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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.