Finding the Fourth Proportional to 1,998,689.40, 2,992,129.20 and 1,325,530.80
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Solution
The fourth proportional to 1,998,689.40, 2,992,129.20 and 1,325,530.80 is: 1,984,380.07
Step by Step Solution
- Step 1: Write the proportion equation
1,998,689.40 : 2,992,129.20 = 1,325,530.80 : x - Step 2: Convert to fraction form
1,998,689.40/2,992,129.20 = 1,325,530.80/x - Step 3: Cross multiply
1,998,689.40x = 2,992,129.20 × 1,325,530.80 - Step 4: Simplify right side
1,998,689.40x = 3,966,159,412,179.36 - Step 5: Solve for x
x = 3,966,159,412,179.36/1,998,689.40 - Step 6: Final answer
x = 1,984,380.07
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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.