Finding the Fourth Proportional to 1,387,193.80, 2,080,790.70 and 389,921.80
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Solution
The fourth proportional to 1,387,193.80, 2,080,790.70 and 389,921.80 is: 584,882.70
Step by Step Solution
- Step 1: Write the proportion equation
1,387,193.80 : 2,080,790.70 = 389,921.80 : x - Step 2: Convert to fraction form
1,387,193.80/2,080,790.70 = 389,921.80/x - Step 3: Cross multiply
1,387,193.80x = 2,080,790.70 × 389,921.80 - Step 4: Simplify right side
1,387,193.80x = 811,345,655,167.26 - Step 5: Solve for x
x = 811,345,655,167.26/1,387,193.80 - Step 6: Final answer
x = 584,882.70
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1.5x scale
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.