Finding the Fourth Proportional to 428,071.40, 642,113.34 and 203,454.74
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Solution
The fourth proportional to 428,071.40, 642,113.34 and 203,454.74 is: 305,185.08
Step by Step Solution
- Step 1: Write the proportion equation
428,071.40 : 642,113.34 = 203,454.74 : x - Step 2: Convert to fraction form
428,071.40/642,113.34 = 203,454.74/x - Step 3: Cross multiply
428,071.40x = 642,113.34 × 203,454.74 - Step 4: Simplify right side
428,071.40x = 130,641,002,640.23 - Step 5: Solve for x
x = 130,641,002,640.23/428,071.40 - Step 6: Final answer
x = 305,185.08
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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.