Finding the Fourth Proportional to 1,188,686,719.18, 1,640,539,008.41 and 718,791,402.94
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Solution
The fourth proportional to 1,188,686,719.18, 1,640,539,008.41 and 718,791,402.94 is: 992,023,647.94
Step by Step Solution
- Step 1: Write the proportion equation
1,188,686,719.18 : 1,640,539,008.41 = 718,791,402.94 : x - Step 2: Convert to fraction form
1,188,686,719.18/1,640,539,008.41 = 718,791,402.94/x - Step 3: Cross multiply
1,188,686,719.18x = 1,640,539,008.41 × 718,791,402.94 - Step 4: Simplify right side
1,188,686,719.18x = 1,179,205,335,425,125,120 - Step 5: Solve for x
x = 1,179,205,335,425,125,120/1,188,686,719.18 - Step 6: Final answer
x = 992,023,647.94
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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.