Finding the Fourth Proportional to 412,419.80, 618,629.70 and 319,107.80
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Solution
The fourth proportional to 412,419.80, 618,629.70 and 319,107.80 is: 478,661.70
Step by Step Solution
- Step 1: Write the proportion equation
412,419.80 : 618,629.70 = 319,107.80 : x - Step 2: Convert to fraction form
412,419.80/618,629.70 = 319,107.80/x - Step 3: Cross multiply
412,419.80x = 618,629.70 × 319,107.80 - Step 4: Simplify right side
412,419.80x = 197,409,562,581.66 - Step 5: Solve for x
x = 197,409,562,581.66/412,419.80 - Step 6: Final answer
x = 478,661.70
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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.