Finding the Fourth Proportional to 427.53, 640.68 and 211.26
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Solution
The fourth proportional to 427.53, 640.68 and 211.26 is: 316.59
Step by Step Solution
- Step 1: Write the proportion equation
427.53 : 640.68 = 211.26 : x - Step 2: Convert to fraction form
427.53/640.68 = 211.26/x - Step 3: Cross multiply
427.53x = 640.68 × 211.26 - Step 4: Simplify right side
427.53x = 135,350.06 - Step 5: Solve for x
x = 135,350.06/427.53 - Step 6: Final answer
x = 316.59
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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.