Finding the Fourth Proportional to 1,207,251,745.20, 1,810,877,617.80 and 430,922,732.40
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Solution
The fourth proportional to 1,207,251,745.20, 1,810,877,617.80 and 430,922,732.40 is: 646,384,098.60
Step by Step Solution
- Step 1: Write the proportion equation
1,207,251,745.20 : 1,810,877,617.80 = 430,922,732.40 : x - Step 2: Convert to fraction form
1,207,251,745.20/1,810,877,617.80 = 430,922,732.40/x - Step 3: Cross multiply
1,207,251,745.20x = 1,810,877,617.80 × 430,922,732.40 - Step 4: Simplify right side
1,207,251,745.20x = 780,348,331,104,378,752 - Step 5: Solve for x
x = 780,348,331,104,378,752/1,207,251,745.20 - Step 6: Final answer
x = 646,384,098.60
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Similar ratio
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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.