Finding the Fourth Proportional to 1,121,431.79, 1,682,066.35 and 438,190.21
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Solution
The fourth proportional to 1,121,431.79, 1,682,066.35 and 438,190.21 is: 657,253.53
Step by Step Solution
- Step 1: Write the proportion equation
1,121,431.79 : 1,682,066.35 = 438,190.21 : x - Step 2: Convert to fraction form
1,121,431.79/1,682,066.35 = 438,190.21/x - Step 3: Cross multiply
1,121,431.79x = 1,682,066.35 × 438,190.21 - Step 4: Simplify right side
1,121,431.79x = 737,065,007,140.43 - Step 5: Solve for x
x = 737,065,007,140.43/1,121,431.79 - Step 6: Final answer
x = 657,253.53
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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.