Finding the Fourth Proportional to 1,992,906,645.20, 2,989,359,967.80 and 612,541,791.80
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Solution
The fourth proportional to 1,992,906,645.20, 2,989,359,967.80 and 612,541,791.80 is: 918,812,687.70
Step by Step Solution
- Step 1: Write the proportion equation
1,992,906,645.20 : 2,989,359,967.80 = 612,541,791.80 : x - Step 2: Convert to fraction form
1,992,906,645.20/2,989,359,967.80 = 612,541,791.80/x - Step 3: Cross multiply
1,992,906,645.20x = 2,989,359,967.80 × 612,541,791.80 - Step 4: Simplify right side
1,992,906,645.20x = 1,831,107,911,011,402,240 - Step 5: Solve for x
x = 1,831,107,911,011,402,240/1,992,906,645.20 - Step 6: Final answer
x = 918,812,687.70
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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.