Finding the Fourth Proportional to 378.41, 521.91 and 230.99
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Solution
The fourth proportional to 378.41, 521.91 and 230.99 is: 318.58
Step by Step Solution
- Step 1: Write the proportion equation
378.41 : 521.91 = 230.99 : x - Step 2: Convert to fraction form
378.41/521.91 = 230.99/x - Step 3: Cross multiply
378.41x = 521.91 × 230.99 - Step 4: Simplify right side
378.41x = 120,553.38 - Step 5: Solve for x
x = 120,553.38/378.41 - Step 6: Final answer
x = 318.58
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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.