Finding the Fourth Proportional to 1,081.53, 1,622.48 and 388.62
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Solution
The fourth proportional to 1,081.53, 1,622.48 and 388.62 is: 582.99
Step by Step Solution
- Step 1: Write the proportion equation
1,081.53 : 1,622.48 = 388.62 : x - Step 2: Convert to fraction form
1,081.53/1,622.48 = 388.62/x - Step 3: Cross multiply
1,081.53x = 1,622.48 × 388.62 - Step 4: Simplify right side
1,081.53x = 630,526.23 - Step 5: Solve for x
x = 630,526.23/1,081.53 - Step 6: Final answer
x = 582.99
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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.