Finding the Fourth Proportional to 3,878,555.38, 5,352,355.39 and 2,136,191.31
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Solution
The fourth proportional to 3,878,555.38, 5,352,355.39 and 2,136,191.31 is: 2,947,915.90
Step by Step Solution
- Step 1: Write the proportion equation
3,878,555.38 : 5,352,355.39 = 2,136,191.31 : x - Step 2: Convert to fraction form
3,878,555.38/5,352,355.39 = 2,136,191.31/x - Step 3: Cross multiply
3,878,555.38x = 5,352,355.39 × 2,136,191.31 - Step 4: Simplify right side
3,878,555.38x = 11,433,655,072,149.66 - Step 5: Solve for x
x = 11,433,655,072,149.66/3,878,555.38 - Step 6: Final answer
x = 2,947,915.90
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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.