Finding the Fourth Proportional to 1,328,545.80, 1,992,818.70 and 921,107.70
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Solution
The fourth proportional to 1,328,545.80, 1,992,818.70 and 921,107.70 is: 1,381,661.55
Step by Step Solution
- Step 1: Write the proportion equation
1,328,545.80 : 1,992,818.70 = 921,107.70 : x - Step 2: Convert to fraction form
1,328,545.80/1,992,818.70 = 921,107.70/x - Step 3: Cross multiply
1,328,545.80x = 1,992,818.70 × 921,107.70 - Step 4: Simplify right side
1,328,545.80x = 1,835,600,649,273.99 - Step 5: Solve for x
x = 1,835,600,649,273.99/1,328,545.80 - Step 6: Final answer
x = 1,381,661.55
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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.