Finding the Fourth Proportional to 1,986,569,511.60, 2,979,755,210.70 and 742,908,543.12
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Solution
The fourth proportional to 1,986,569,511.60, 2,979,755,210.70 and 742,908,543.12 is: 1,114,325,770.89
Step by Step Solution
- Step 1: Write the proportion equation
1,986,569,511.60 : 2,979,755,210.70 = 742,908,543.12 : x - Step 2: Convert to fraction form
1,986,569,511.60/2,979,755,210.70 = 742,908,543.12/x - Step 3: Cross multiply
1,986,569,511.60x = 2,979,755,210.70 × 742,908,543.12 - Step 4: Simplify right side
1,986,569,511.60x = 2,213,685,602,435,365,632 - Step 5: Solve for x
x = 2,213,685,602,435,365,632/1,986,569,511.60 - Step 6: Final answer
x = 1,114,325,770.89
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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.