Finding the Fourth Proportional to 1,988,221.53, 2,743,823.39 and 1,128,861.75
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Solution
The fourth proportional to 1,988,221.53, 2,743,823.39 and 1,128,861.75 is: 1,557,873.32
Step by Step Solution
- Step 1: Write the proportion equation
1,988,221.53 : 2,743,823.39 = 1,128,861.75 : x - Step 2: Convert to fraction form
1,988,221.53/2,743,823.39 = 1,128,861.75/x - Step 3: Cross multiply
1,988,221.53x = 2,743,823.39 × 1,128,861.75 - Step 4: Simplify right side
1,988,221.53x = 3,097,397,268,082.02 - Step 5: Solve for x
x = 3,097,397,268,082.02/1,988,221.53 - Step 6: Final answer
x = 1,557,873.32
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.