Finding the Fourth Proportional to 685,842.30, 1,026,795.15 and 420,121.80
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Solution
The fourth proportional to 685,842.30, 1,026,795.15 and 420,121.80 is: 628,976.99
Step by Step Solution
- Step 1: Write the proportion equation
685,842.30 : 1,026,795.15 = 420,121.80 : x - Step 2: Convert to fraction form
685,842.30/1,026,795.15 = 420,121.80/x - Step 3: Cross multiply
685,842.30x = 1,026,795.15 × 420,121.80 - Step 4: Simplify right side
685,842.30x = 431,379,026,649.27 - Step 5: Solve for x
x = 431,379,026,649.27/685,842.30 - Step 6: Final answer
x = 628,976.99
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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.