Finding the Fourth Proportional to 1,107,639.11, 1,528,826.35 and 721,416.93
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Solution
The fourth proportional to 1,107,639.11, 1,528,826.35 and 721,416.93 is: 995,740.58
Step by Step Solution
- Step 1: Write the proportion equation
1,107,639.11 : 1,528,826.35 = 721,416.93 : x - Step 2: Convert to fraction form
1,107,639.11/1,528,826.35 = 721,416.93/x - Step 3: Cross multiply
1,107,639.11x = 1,528,826.35 × 721,416.93 - Step 4: Simplify right side
1,107,639.11x = 1,102,921,211,920.11 - Step 5: Solve for x
x = 1,102,921,211,920.11/1,107,639.11 - Step 6: Final answer
x = 995,740.58
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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.