Finding the Fourth Proportional to 1,118,207,998.20, 1,677,311,997.30 and 791,690,647.80
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Solution
The fourth proportional to 1,118,207,998.20, 1,677,311,997.30 and 791,690,647.80 is: 1,187,535,971.70
Step by Step Solution
- Step 1: Write the proportion equation
1,118,207,998.20 : 1,677,311,997.30 = 791,690,647.80 : x - Step 2: Convert to fraction form
1,118,207,998.20/1,677,311,997.30 = 791,690,647.80/x - Step 3: Cross multiply
1,118,207,998.20x = 1,677,311,997.30 × 791,690,647.80 - Step 4: Simplify right side
1,118,207,998.20x = 1,327,912,221,705,148,672 - Step 5: Solve for x
x = 1,327,912,221,705,148,672/1,118,207,998.20 - Step 6: Final answer
x = 1,187,535,971.70
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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.