Finding the Fourth Proportional to 1,398,679,578.48, 1,930,127,217.60 and 772,134,553.12
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Solution
The fourth proportional to 1,398,679,578.48, 1,930,127,217.60 and 772,134,553.12 is: 1,065,517,749.42
Step by Step Solution
- Step 1: Write the proportion equation
1,398,679,578.48 : 1,930,127,217.60 = 772,134,553.12 : x - Step 2: Convert to fraction form
1,398,679,578.48/1,930,127,217.60 = 772,134,553.12/x - Step 3: Cross multiply
1,398,679,578.48x = 1,930,127,217.60 × 772,134,553.12 - Step 4: Simplify right side
1,398,679,578.48x = 1,490,317,916,626,324,992 - Step 5: Solve for x
x = 1,490,317,916,626,324,992/1,398,679,578.48 - Step 6: Final answer
x = 1,065,517,749.42
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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.