Finding the Fourth Proportional to 3,478,278.80, 5,217,418.20 and 2,638,470.80
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Solution
The fourth proportional to 3,478,278.80, 5,217,418.20 and 2,638,470.80 is: 3,957,706.20
Step by Step Solution
- Step 1: Write the proportion equation
3,478,278.80 : 5,217,418.20 = 2,638,470.80 : x - Step 2: Convert to fraction form
3,478,278.80/5,217,418.20 = 2,638,470.80/x - Step 3: Cross multiply
3,478,278.80x = 5,217,418.20 × 2,638,470.80 - Step 4: Simplify right side
3,478,278.80x = 13,766,005,572,088.56 - Step 5: Solve for x
x = 13,766,005,572,088.56/3,478,278.80 - Step 6: Final answer
x = 3,957,706.20
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1.5x scale
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.