Finding the Fourth Proportional to 1,392,819.66, 1,922,489.72 and 820,191.99
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Solution
The fourth proportional to 1,392,819.66, 1,922,489.72 and 820,191.99 is: 1,132,099.66
Step by Step Solution
- Step 1: Write the proportion equation
1,392,819.66 : 1,922,489.72 = 820,191.99 : x - Step 2: Convert to fraction form
1,392,819.66/1,922,489.72 = 820,191.99/x - Step 3: Cross multiply
1,392,819.66x = 1,922,489.72 × 820,191.99 - Step 4: Simplify right side
1,392,819.66x = 1,576,810,669,201.34 - Step 5: Solve for x
x = 1,576,810,669,201.34/1,392,819.66 - Step 6: Final answer
x = 1,132,099.66
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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.