Finding the Fourth Proportional to 1,278,571.68, 1,918,169.52 and 425,641.92
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Solution
The fourth proportional to 1,278,571.68, 1,918,169.52 and 425,641.92 is: 638,566.75
Step by Step Solution
- Step 1: Write the proportion equation
1,278,571.68 : 1,918,169.52 = 425,641.92 : x - Step 2: Convert to fraction form
1,278,571.68/1,918,169.52 = 425,641.92/x - Step 3: Cross multiply
1,278,571.68x = 1,918,169.52 × 425,641.92 - Step 4: Simplify right side
1,278,571.68x = 816,453,357,378.28 - Step 5: Solve for x
x = 816,453,357,378.28/1,278,571.68 - Step 6: Final answer
x = 638,566.75
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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.