Finding the Fourth Proportional to 378.91, 568.45 and 135.44
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Solution
The fourth proportional to 378.91, 568.45 and 135.44 is: 203.19
Step by Step Solution
- Step 1: Write the proportion equation
378.91 : 568.45 = 135.44 : x - Step 2: Convert to fraction form
378.91/568.45 = 135.44/x - Step 3: Cross multiply
378.91x = 568.45 × 135.44 - Step 4: Simplify right side
378.91x = 76,990.87 - Step 5: Solve for x
x = 76,990.87/378.91 - Step 6: Final answer
x = 203.19
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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.