Finding the Fourth Proportional to 1,539,649,136.80, 2,309,473,705.20 and 721,844,106.40
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Solution
The fourth proportional to 1,539,649,136.80, 2,309,473,705.20 and 721,844,106.40 is: 1,082,766,159.60
Step by Step Solution
- Step 1: Write the proportion equation
1,539,649,136.80 : 2,309,473,705.20 = 721,844,106.40 : x - Step 2: Convert to fraction form
1,539,649,136.80/2,309,473,705.20 = 721,844,106.40/x - Step 3: Cross multiply
1,539,649,136.80x = 2,309,473,705.20 × 721,844,106.40 - Step 4: Simplify right side
1,539,649,136.80x = 1,667,079,982,984,390,912 - Step 5: Solve for x
x = 1,667,079,982,984,390,912/1,539,649,136.80 - Step 6: Final answer
x = 1,082,766,159.60
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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.