Finding the Fourth Proportional to 378.21, 521.99 and 212.44
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Solution
The fourth proportional to 378.21, 521.99 and 212.44 is: 293.19
Step by Step Solution
- Step 1: Write the proportion equation
378.21 : 521.99 = 212.44 : x - Step 2: Convert to fraction form
378.21/521.99 = 212.44/x - Step 3: Cross multiply
378.21x = 521.99 × 212.44 - Step 4: Simplify right side
378.21x = 110,887.88 - Step 5: Solve for x
x = 110,887.88/378.21 - Step 6: Final answer
x = 293.19
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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.