Finding the Fourth Proportional to 1,491,782,220.86, 2,237,023,709.06 and 427,970,344.08
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Solution
The fourth proportional to 1,491,782,220.86, 2,237,023,709.06 and 427,970,344.08 is: 641,769,149.07
Step by Step Solution
- Step 1: Write the proportion equation
1,491,782,220.86 : 2,237,023,709.06 = 427,970,344.08 : x - Step 2: Convert to fraction form
1,491,782,220.86/2,237,023,709.06 = 427,970,344.08/x - Step 3: Cross multiply
1,491,782,220.86x = 2,237,023,709.06 × 427,970,344.08 - Step 4: Simplify right side
1,491,782,220.86x = 957,379,806,482,595,840 - Step 5: Solve for x
x = 957,379,806,482,595,840/1,491,782,220.86 - Step 6: Final answer
x = 641,769,149.07
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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.