Finding the Fourth Proportional to 290.72, 435.74 and 107.99
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Solution
The fourth proportional to 290.72, 435.74 and 107.99 is: 161.86
Step by Step Solution
- Step 1: Write the proportion equation
290.72 : 435.74 = 107.99 : x - Step 2: Convert to fraction form
290.72/435.74 = 107.99/x - Step 3: Cross multiply
290.72x = 435.74 × 107.99 - Step 4: Simplify right side
290.72x = 47,056.11 - Step 5: Solve for x
x = 47,056.11/290.72 - Step 6: Final answer
x = 161.86
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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.