Finding the Fourth Proportional to 1,171,857,643.74, 1,618,505,713.08 and 771,759,920.88
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Solution
The fourth proportional to 1,171,857,643.74, 1,618,505,713.08 and 771,759,920.88 is: 1,065,912,611.27
Step by Step Solution
- Step 1: Write the proportion equation
1,171,857,643.74 : 1,618,505,713.08 = 771,759,920.88 : x - Step 2: Convert to fraction form
1,171,857,643.74/1,618,505,713.08 = 771,759,920.88/x - Step 3: Cross multiply
1,171,857,643.74x = 1,618,505,713.08 × 771,759,920.88 - Step 4: Simplify right side
1,171,857,643.74x = 1,249,097,841,070,448,640 - Step 5: Solve for x
x = 1,249,097,841,070,448,640/1,171,857,643.74 - Step 6: Final answer
x = 1,065,912,611.27
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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.