Finding the Fourth Proportional to 5,478,839.20, 8,218,258.80 and 2,492,855.20
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Solution
The fourth proportional to 5,478,839.20, 8,218,258.80 and 2,492,855.20 is: 3,739,282.80
Step by Step Solution
- Step 1: Write the proportion equation
5,478,839.20 : 8,218,258.80 = 2,492,855.20 : x - Step 2: Convert to fraction form
5,478,839.20/8,218,258.80 = 2,492,855.20/x - Step 3: Cross multiply
5,478,839.20x = 8,218,258.80 × 2,492,855.20 - Step 4: Simplify right side
5,478,839.20x = 20,486,929,184,525.76 - Step 5: Solve for x
x = 20,486,929,184,525.76/5,478,839.20 - Step 6: Final answer
x = 3,739,282.80
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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.