Finding the Fourth Proportional to 2,625,416.40, 3,938,124.60 and 1,987,687.20
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Solution
The fourth proportional to 2,625,416.40, 3,938,124.60 and 1,987,687.20 is: 2,981,530.80
Step by Step Solution
- Step 1: Write the proportion equation
2,625,416.40 : 3,938,124.60 = 1,987,687.20 : x - Step 2: Convert to fraction form
2,625,416.40/3,938,124.60 = 1,987,687.20/x - Step 3: Cross multiply
2,625,416.40x = 3,938,124.60 × 1,987,687.20 - Step 4: Simplify right side
2,625,416.40x = 7,827,759,859,425.12 - Step 5: Solve for x
x = 7,827,759,859,425.12/2,625,416.40 - Step 6: Final answer
x = 2,981,530.80
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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.