Finding the Fourth Proportional to 1,129,139.45, 1,558,172.08 and 639,098.45
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Solution
The fourth proportional to 1,129,139.45, 1,558,172.08 and 639,098.45 is: 881,933.02
Step by Step Solution
- Step 1: Write the proportion equation
1,129,139.45 : 1,558,172.08 = 639,098.45 : x - Step 2: Convert to fraction form
1,129,139.45/1,558,172.08 = 639,098.45/x - Step 3: Cross multiply
1,129,139.45x = 1,558,172.08 × 639,098.45 - Step 4: Simplify right side
1,129,139.45x = 995,825,361,161.28 - Step 5: Solve for x
x = 995,825,361,161.28/1,129,139.45 - Step 6: Final answer
x = 881,933.02
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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.