Finding the Fourth Proportional to 1,993,319,996.80, 2,989,979,995.20 and 957,931,211.20
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Solution
The fourth proportional to 1,993,319,996.80, 2,989,979,995.20 and 957,931,211.20 is: 1,436,896,816.80
Step by Step Solution
- Step 1: Write the proportion equation
1,993,319,996.80 : 2,989,979,995.20 = 957,931,211.20 : x - Step 2: Convert to fraction form
1,993,319,996.80/2,989,979,995.20 = 957,931,211.20/x - Step 3: Cross multiply
1,993,319,996.80x = 2,989,979,995.20 × 957,931,211.20 - Step 4: Simplify right side
1,993,319,996.80x = 2,864,195,158,265,705,984 - Step 5: Solve for x
x = 2,864,195,158,265,705,984/1,993,319,996.80 - Step 6: Final answer
x = 1,436,896,816.80
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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.