Finding the Fourth Proportional to 1,287,724,805.76, 1,777,445,596.68 and 752,020,974.18
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Solution
The fourth proportional to 1,287,724,805.76, 1,777,445,596.68 and 752,020,974.18 is: 1,038,013,994.29
Step by Step Solution
- Step 1: Write the proportion equation
1,287,724,805.76 : 1,777,445,596.68 = 752,020,974.18 : x - Step 2: Convert to fraction form
1,287,724,805.76/1,777,445,596.68 = 752,020,974.18/x - Step 3: Cross multiply
1,287,724,805.76x = 1,777,445,596.68 × 752,020,974.18 - Step 4: Simplify right side
1,287,724,805.76x = 1,336,676,369,167,245,056 - Step 5: Solve for x
x = 1,336,676,369,167,245,056/1,287,724,805.76 - Step 6: Final answer
x = 1,038,013,994.29
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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.