Finding the Fourth Proportional to 870,998,331.68, 1,201,170,315.12 and 635,676,250.40
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Solution
The fourth proportional to 870,998,331.68, 1,201,170,315.12 and 635,676,250.40 is: 876,643,977.65
Step by Step Solution
- Step 1: Write the proportion equation
870,998,331.68 : 1,201,170,315.12 = 635,676,250.40 : x - Step 2: Convert to fraction form
870,998,331.68/1,201,170,315.12 = 635,676,250.40/x - Step 3: Cross multiply
870,998,331.68x = 1,201,170,315.12 × 635,676,250.40 - Step 4: Simplify right side
870,998,331.68x = 763,555,442,007,267,968 - Step 5: Solve for x
x = 763,555,442,007,267,968/870,998,331.68 - Step 6: Final answer
x = 876,643,977.65
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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.