Finding the Fourth Proportional to 428.47, 642.11 and 232.99
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Solution
The fourth proportional to 428.47, 642.11 and 232.99 is: 349.16
Step by Step Solution
- Step 1: Write the proportion equation
428.47 : 642.11 = 232.99 : x - Step 2: Convert to fraction form
428.47/642.11 = 232.99/x - Step 3: Cross multiply
428.47x = 642.11 × 232.99 - Step 4: Simplify right side
428.47x = 149,605.21 - Step 5: Solve for x
x = 149,605.21/428.47 - Step 6: Final answer
x = 349.16
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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.