Finding the Fourth Proportional to 638,831,311.20, 958,246,966.80 and 409,248,799.20
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Solution
The fourth proportional to 638,831,311.20, 958,246,966.80 and 409,248,799.20 is: 613,873,198.80
Step by Step Solution
- Step 1: Write the proportion equation
638,831,311.20 : 958,246,966.80 = 409,248,799.20 : x - Step 2: Convert to fraction form
638,831,311.20/958,246,966.80 = 409,248,799.20/x - Step 3: Cross multiply
638,831,311.20x = 958,246,966.80 × 409,248,799.20 - Step 4: Simplify right side
638,831,311.20x = 392,161,420,499,942,208 - Step 5: Solve for x
x = 392,161,420,499,942,208/638,831,311.20 - Step 6: Final answer
x = 613,873,198.80
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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.