Finding the Fourth Proportional to 1,107,639.36, 1,528,826.69 and 721,417.18
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Solution
The fourth proportional to 1,107,639.36, 1,528,826.69 and 721,417.18 is: 995,740.92
Step by Step Solution
- Step 1: Write the proportion equation
1,107,639.36 : 1,528,826.69 = 721,417.18 : x - Step 2: Convert to fraction form
1,107,639.36/1,528,826.69 = 721,417.18/x - Step 3: Cross multiply
1,107,639.36x = 1,528,826.69 × 721,417.18 - Step 4: Simplify right side
1,107,639.36x = 1,102,921,839,408.53 - Step 5: Solve for x
x = 1,102,921,839,408.53/1,107,639.36 - Step 6: Final answer
x = 995,740.92
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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.