Finding the Fourth Proportional to 428.00, 641.84 and 153.99
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Solution
The fourth proportional to 428.00, 641.84 and 153.99 is: 230.93
Step by Step Solution
- Step 1: Write the proportion equation
428.00 : 641.84 = 153.99 : x - Step 2: Convert to fraction form
428.00/641.84 = 153.99/x - Step 3: Cross multiply
428.00x = 641.84 × 153.99 - Step 4: Simplify right side
428.00x = 98,836.17 - Step 5: Solve for x
x = 98,836.17/428.00 - Step 6: Final answer
x = 230.93
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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.