Finding the Fourth Proportional to 1,260,317,715.85, 1,890,450,613.29 and 420,021,482.38
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Solution
The fourth proportional to 1,260,317,715.85, 1,890,450,613.29 and 420,021,482.38 is: 630,023,571.80
Step by Step Solution
- Step 1: Write the proportion equation
1,260,317,715.85 : 1,890,450,613.29 = 420,021,482.38 : x - Step 2: Convert to fraction form
1,260,317,715.85/1,890,450,613.29 = 420,021,482.38/x - Step 3: Cross multiply
1,260,317,715.85x = 1,890,450,613.29 × 420,021,482.38 - Step 4: Simplify right side
1,260,317,715.85x = 794,029,868,948,693,632 - Step 5: Solve for x
x = 794,029,868,948,693,632/1,260,317,715.85 - Step 6: Final answer
x = 630,023,571.80
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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.