Finding the Fourth Proportional to 3,111,211.75, 4,293,475.10 and 1,680,427.75
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Solution
The fourth proportional to 3,111,211.75, 4,293,475.10 and 1,680,427.75 is: 2,318,991.85
Step by Step Solution
- Step 1: Write the proportion equation
3,111,211.75 : 4,293,475.10 = 1,680,427.75 : x - Step 2: Convert to fraction form
3,111,211.75/4,293,475.10 = 1,680,427.75/x - Step 3: Cross multiply
3,111,211.75x = 4,293,475.10 × 1,680,427.75 - Step 4: Simplify right side
3,111,211.75x = 7,214,874,701,974.03 - Step 5: Solve for x
x = 7,214,874,701,974.03/3,111,211.75 - Step 6: Final answer
x = 2,318,991.85
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.