Finding the Fourth Proportional to 276.40, 382.08 and 221.68
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Solution
The fourth proportional to 276.40, 382.08 and 221.68 is: 306.44
Step by Step Solution
- Step 1: Write the proportion equation
276.40 : 382.08 = 221.68 : x - Step 2: Convert to fraction form
276.40/382.08 = 221.68/x - Step 3: Cross multiply
276.40x = 382.08 × 221.68 - Step 4: Simplify right side
276.40x = 84,699.49 - Step 5: Solve for x
x = 84,699.49/276.40 - Step 6: Final answer
x = 306.44
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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.