Finding the Fourth Proportional to 428,125.98, 642,587.49 and 217,921.26
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Solution
The fourth proportional to 428,125.98, 642,587.49 and 217,921.26 is: 327,084.74
Step by Step Solution
- Step 1: Write the proportion equation
428,125.98 : 642,587.49 = 217,921.26 : x - Step 2: Convert to fraction form
428,125.98/642,587.49 = 217,921.26/x - Step 3: Cross multiply
428,125.98x = 642,587.49 × 217,921.26 - Step 4: Simplify right side
428,125.98x = 140,033,475,481.04 - Step 5: Solve for x
x = 140,033,475,481.04/428,125.98 - Step 6: Final answer
x = 327,084.74
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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.