Finding the Fourth Proportional to 1,259,809,908.40, 1,889,714,862.60 and 999,616,394.80
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Solution
The fourth proportional to 1,259,809,908.40, 1,889,714,862.60 and 999,616,394.80 is: 1,499,424,592.20
Step by Step Solution
- Step 1: Write the proportion equation
1,259,809,908.40 : 1,889,714,862.60 = 999,616,394.80 : x - Step 2: Convert to fraction form
1,259,809,908.40/1,889,714,862.60 = 999,616,394.80/x - Step 3: Cross multiply
1,259,809,908.40x = 1,889,714,862.60 × 999,616,394.80 - Step 4: Simplify right side
1,259,809,908.40x = 1,888,989,958,152,189,184 - Step 5: Solve for x
x = 1,888,989,958,152,189,184/1,259,809,908.40 - Step 6: Final answer
x = 1,499,424,592.20
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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.