Finding the Fourth Proportional to 378.99, 568.41 and 135.49
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Solution
The fourth proportional to 378.99, 568.41 and 135.49 is: 203.21
Step by Step Solution
- Step 1: Write the proportion equation
378.99 : 568.41 = 135.49 : x - Step 2: Convert to fraction form
378.99/568.41 = 135.49/x - Step 3: Cross multiply
378.99x = 568.41 × 135.49 - Step 4: Simplify right side
378.99x = 77,013.87 - Step 5: Solve for x
x = 77,013.87/378.99 - Step 6: Final answer
x = 203.21
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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.