Finding the Fourth Proportional to 2,199,387,639.40, 3,299,081,459.10 and 818,916,497.80
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Solution
The fourth proportional to 2,199,387,639.40, 3,299,081,459.10 and 818,916,497.80 is: 1,228,374,746.70
Step by Step Solution
- Step 1: Write the proportion equation
2,199,387,639.40 : 3,299,081,459.10 = 818,916,497.80 : x - Step 2: Convert to fraction form
2,199,387,639.40/3,299,081,459.10 = 818,916,497.80/x - Step 3: Cross multiply
2,199,387,639.40x = 3,299,081,459.10 × 818,916,497.80 - Step 4: Simplify right side
2,199,387,639.40x = 2,701,672,234,443,085,824 - Step 5: Solve for x
x = 2,701,672,234,443,085,824/2,199,387,639.40 - Step 6: Final answer
x = 1,228,374,746.70
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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.