Finding the Fourth Proportional to 1,281,112.49, 1,921,747.98 and 428,260.88
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Solution
The fourth proportional to 1,281,112.49, 1,921,747.98 and 428,260.88 is: 642,417.81
Step by Step Solution
- Step 1: Write the proportion equation
1,281,112.49 : 1,921,747.98 = 428,260.88 : x - Step 2: Convert to fraction form
1,281,112.49/1,921,747.98 = 428,260.88/x - Step 3: Cross multiply
1,281,112.49x = 1,921,747.98 × 428,260.88 - Step 4: Simplify right side
1,281,112.49x = 823,009,481,053.02 - Step 5: Solve for x
x = 823,009,481,053.02/1,281,112.49 - Step 6: Final answer
x = 642,417.81
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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.