Finding the Fourth Proportional to 1,442,705,349.18, 1,990,765,419.92 and 807,660,615.12
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Solution
The fourth proportional to 1,442,705,349.18, 1,990,765,419.92 and 807,660,615.12 is: 1,114,477,619.79
Step by Step Solution
- Step 1: Write the proportion equation
1,442,705,349.18 : 1,990,765,419.92 = 807,660,615.12 : x - Step 2: Convert to fraction form
1,442,705,349.18/1,990,765,419.92 = 807,660,615.12/x - Step 3: Cross multiply
1,442,705,349.18x = 1,990,765,419.92 × 807,660,615.12 - Step 4: Simplify right side
1,442,705,349.18x = 1,607,862,823,612,212,480 - Step 5: Solve for x
x = 1,607,862,823,612,212,480/1,442,705,349.18 - Step 6: Final answer
x = 1,114,477,619.79
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1.5x scale
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.