Finding the Fourth Proportional to 1,237,156,242.80, 1,855,734,364.20 and 419,268,543.80
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Solution
The fourth proportional to 1,237,156,242.80, 1,855,734,364.20 and 419,268,543.80 is: 628,902,815.70
Step by Step Solution
- Step 1: Write the proportion equation
1,237,156,242.80 : 1,855,734,364.20 = 419,268,543.80 : x - Step 2: Convert to fraction form
1,237,156,242.80/1,855,734,364.20 = 419,268,543.80/x - Step 3: Cross multiply
1,237,156,242.80x = 1,855,734,364.20 × 419,268,543.80 - Step 4: Simplify right side
1,237,156,242.80x = 778,051,044,557,752,832 - Step 5: Solve for x
x = 778,051,044,557,752,832/1,237,156,242.80 - Step 6: Final answer
x = 628,902,815.70
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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.