Finding the Fourth Proportional to 1,327,742,108.69, 1,991,585,813.68 and 442,491,755.68
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Solution
The fourth proportional to 1,327,742,108.69, 1,991,585,813.68 and 442,491,755.68 is: 663,728,518.91
Step by Step Solution
- Step 1: Write the proportion equation
1,327,742,108.69 : 1,991,585,813.68 = 442,491,755.68 : x - Step 2: Convert to fraction form
1,327,742,108.69/1,991,585,813.68 = 442,491,755.68/x - Step 3: Cross multiply
1,327,742,108.69x = 1,991,585,813.68 × 442,491,755.68 - Step 4: Simplify right side
1,327,742,108.69x = 881,260,303,285,684,992 - Step 5: Solve for x
x = 881,260,303,285,684,992/1,327,742,108.69 - Step 6: Final answer
x = 663,728,518.91
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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.