Finding the Fourth Proportional to 1,221,394.15, 1,831,205.49 and 821,041.93
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Solution
The fourth proportional to 1,221,394.15, 1,831,205.49 and 821,041.93 is: 1,230,967.49
Step by Step Solution
- Step 1: Write the proportion equation
1,221,394.15 : 1,831,205.49 = 821,041.93 : x - Step 2: Convert to fraction form
1,221,394.15/1,831,205.49 = 821,041.93/x - Step 3: Cross multiply
1,221,394.15x = 1,831,205.49 × 821,041.93 - Step 4: Simplify right side
1,221,394.15x = 1,503,496,489,736.20 - Step 5: Solve for x
x = 1,503,496,489,736.20/1,221,394.15 - Step 6: Final answer
x = 1,230,967.49
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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.