Finding the Fourth Proportional to 378.72, 568.08 and 135.18
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Solution
The fourth proportional to 378.72, 568.08 and 135.18 is: 202.77
Step by Step Solution
- Step 1: Write the proportion equation
378.72 : 568.08 = 135.18 : x - Step 2: Convert to fraction form
378.72/568.08 = 135.18/x - Step 3: Cross multiply
378.72x = 568.08 × 135.18 - Step 4: Simplify right side
378.72x = 76,793.05 - Step 5: Solve for x
x = 76,793.05/378.72 - Step 6: Final answer
x = 202.77
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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.