Finding the Fourth Proportional to 1,257,220,609.62, 1,734,982,416.93 and 721,459,583.70
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Solution
The fourth proportional to 1,257,220,609.62, 1,734,982,416.93 and 721,459,583.70 is: 995,624,540.89
Step by Step Solution
- Step 1: Write the proportion equation
1,257,220,609.62 : 1,734,982,416.93 = 721,459,583.70 : x - Step 2: Convert to fraction form
1,257,220,609.62/1,734,982,416.93 = 721,459,583.70/x - Step 3: Cross multiply
1,257,220,609.62x = 1,734,982,416.93 × 721,459,583.70 - Step 4: Simplify right side
1,257,220,609.62x = 1,251,719,692,245,137,664 - Step 5: Solve for x
x = 1,251,719,692,245,137,664/1,257,220,609.62 - Step 6: Final answer
x = 995,624,540.89
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.