Finding the Fourth Proportional to 1,212,302,215.80, 1,818,453,323.70 and 921,736,849.05
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Solution
The fourth proportional to 1,212,302,215.80, 1,818,453,323.70 and 921,736,849.05 is: 1,382,605,273.58
Step by Step Solution
- Step 1: Write the proportion equation
1,212,302,215.80 : 1,818,453,323.70 = 921,736,849.05 : x - Step 2: Convert to fraction form
1,212,302,215.80/1,818,453,323.70 = 921,736,849.05/x - Step 3: Cross multiply
1,212,302,215.80x = 1,818,453,323.70 × 921,736,849.05 - Step 4: Simplify right side
1,212,302,215.80x = 1,676,135,436,731,737,600 - Step 5: Solve for x
x = 1,676,135,436,731,737,600/1,212,302,215.80 - Step 6: Final answer
x = 1,382,605,273.58
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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.