Finding the Fourth Proportional to 1,991,765,278.40, 2,985,632,378.40 and 1,173,456,363.20
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Solution
The fourth proportional to 1,991,765,278.40, 2,985,632,378.40 and 1,173,456,363.20 is: 1,758,997,081.94
Step by Step Solution
- Step 1: Write the proportion equation
1,991,765,278.40 : 2,985,632,378.40 = 1,173,456,363.20 : x - Step 2: Convert to fraction form
1,991,765,278.40/2,985,632,378.40 = 1,173,456,363.20/x - Step 3: Cross multiply
1,991,765,278.40x = 2,985,632,378.40 × 1,173,456,363.20 - Step 4: Simplify right side
1,991,765,278.40x = 3,503,509,312,609,430,528 - Step 5: Solve for x
x = 3,503,509,312,609,430,528/1,991,765,278.40 - Step 6: Final answer
x = 1,758,997,081.94
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.