Finding the Fourth Proportional to 721,628,361.24, 995,847,129.98 and 391,603,500.24
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Solution
The fourth proportional to 721,628,361.24, 995,847,129.98 and 391,603,500.24 is: 540,412,825.70
Step by Step Solution
- Step 1: Write the proportion equation
721,628,361.24 : 995,847,129.98 = 391,603,500.24 : x - Step 2: Convert to fraction form
721,628,361.24/995,847,129.98 = 391,603,500.24/x - Step 3: Cross multiply
721,628,361.24x = 995,847,129.98 × 391,603,500.24 - Step 4: Simplify right side
721,628,361.24x = 389,977,221,804,126,272 - Step 5: Solve for x
x = 389,977,221,804,126,272/721,628,361.24 - Step 6: Final answer
x = 540,412,825.70
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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.