Finding the Fourth Proportional to 1,520,824,725.99, 2,098,069,578.81 and 917,658,915.09
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Solution
The fourth proportional to 1,520,824,725.99, 2,098,069,578.81 and 917,658,915.09 is: 1,265,965,906.90
Step by Step Solution
- Step 1: Write the proportion equation
1,520,824,725.99 : 2,098,069,578.81 = 917,658,915.09 : x - Step 2: Convert to fraction form
1,520,824,725.99/2,098,069,578.81 = 917,658,915.09/x - Step 3: Cross multiply
1,520,824,725.99x = 2,098,069,578.81 × 917,658,915.09 - Step 4: Simplify right side
1,520,824,725.99x = 1,925,312,253,474,117,888 - Step 5: Solve for x
x = 1,925,312,253,474,117,888/1,520,824,725.99 - Step 6: Final answer
x = 1,265,965,906.90
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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.