Finding the Fourth Proportional to 1,387,993.70, 2,081,990.55 and 828,121.70
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Solution
The fourth proportional to 1,387,993.70, 2,081,990.55 and 828,121.70 is: 1,242,182.55
Step by Step Solution
- Step 1: Write the proportion equation
1,387,993.70 : 2,081,990.55 = 828,121.70 : x - Step 2: Convert to fraction form
1,387,993.70/2,081,990.55 = 828,121.70/x - Step 3: Cross multiply
1,387,993.70x = 2,081,990.55 × 828,121.70 - Step 4: Simplify right side
1,387,993.70x = 1,724,141,553,649.94 - Step 5: Solve for x
x = 1,724,141,553,649.94/1,387,993.70 - Step 6: Final answer
x = 1,242,182.55
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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.