Finding the Fourth Proportional to 1,259,715,943.20, 1,889,573,914.80 and 706,450,432.80
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Solution
The fourth proportional to 1,259,715,943.20, 1,889,573,914.80 and 706,450,432.80 is: 1,059,675,649.20
Step by Step Solution
- Step 1: Write the proportion equation
1,259,715,943.20 : 1,889,573,914.80 = 706,450,432.80 : x - Step 2: Convert to fraction form
1,259,715,943.20/1,889,573,914.80 = 706,450,432.80/x - Step 3: Cross multiply
1,259,715,943.20x = 1,889,573,914.80 × 706,450,432.80 - Step 4: Simplify right side
1,259,715,943.20x = 1,334,890,309,918,050,304 - Step 5: Solve for x
x = 1,334,890,309,918,050,304/1,259,715,943.20 - Step 6: Final answer
x = 1,059,675,649.20
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1.5x scale
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.