Finding the Fourth Proportional to 1,189,311,395.68, 1,641,296,354.64 and 813,755,698.72
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Solution
The fourth proportional to 1,189,311,395.68, 1,641,296,354.64 and 813,755,698.72 is: 1,123,014,768.65
Step by Step Solution
- Step 1: Write the proportion equation
1,189,311,395.68 : 1,641,296,354.64 = 813,755,698.72 : x - Step 2: Convert to fraction form
1,189,311,395.68/1,641,296,354.64 = 813,755,698.72/x - Step 3: Cross multiply
1,189,311,395.68x = 1,641,296,354.64 × 813,755,698.72 - Step 4: Simplify right side
1,189,311,395.68x = 1,335,614,261,876,662,272 - Step 5: Solve for x
x = 1,335,614,261,876,662,272/1,189,311,395.68 - Step 6: Final answer
x = 1,123,014,768.65
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.