Finding the Fourth Proportional to 428.63, 642.97 and 184.99
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Solution
The fourth proportional to 428.63, 642.97 and 184.99 is: 277.50
Step by Step Solution
- Step 1: Write the proportion equation
428.63 : 642.97 = 184.99 : x - Step 2: Convert to fraction form
428.63/642.97 = 184.99/x - Step 3: Cross multiply
428.63x = 642.97 × 184.99 - Step 4: Simplify right side
428.63x = 118,943.02 - Step 5: Solve for x
x = 118,943.02/428.63 - Step 6: Final answer
x = 277.50
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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.