Finding the Fourth Proportional to 220,121.70, 330,182.55 and 206,999.70
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Solution
The fourth proportional to 220,121.70, 330,182.55 and 206,999.70 is: 310,499.55
Step by Step Solution
- Step 1: Write the proportion equation
220,121.70 : 330,182.55 = 206,999.70 : x - Step 2: Convert to fraction form
220,121.70/330,182.55 = 206,999.70/x - Step 3: Cross multiply
220,121.70x = 330,182.55 × 206,999.70 - Step 4: Simplify right side
220,121.70x = 68,347,688,795.24 - Step 5: Solve for x
x = 68,347,688,795.24/220,121.70 - Step 6: Final answer
x = 310,499.55
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Double scale
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Similar ratio
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1.5x scale
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.