Finding the Fourth Proportional to 7,231,690.80, 9,979,855.80 and 3,968,809.11
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Solution
The fourth proportional to 7,231,690.80, 9,979,855.80 and 3,968,809.11 is: 5,477,023.80
Step by Step Solution
- Step 1: Write the proportion equation
7,231,690.80 : 9,979,855.80 = 3,968,809.11 : x - Step 2: Convert to fraction form
7,231,690.80/9,979,855.80 = 3,968,809.11/x - Step 3: Cross multiply
7,231,690.80x = 9,979,855.80 × 3,968,809.11 - Step 4: Simplify right side
7,231,690.80x = 39,608,142,600,643.30 - Step 5: Solve for x
x = 39,608,142,600,643.30/7,231,690.80 - Step 6: Final answer
x = 5,477,023.80
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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.