Finding the Fourth Proportional to 3,938,349.80, 5,434,788.36 and 2,172,318.09
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Solution
The fourth proportional to 3,938,349.80, 5,434,788.36 and 2,172,318.09 is: 2,997,724.86
Step by Step Solution
- Step 1: Write the proportion equation
3,938,349.80 : 5,434,788.36 = 2,172,318.09 : x - Step 2: Convert to fraction form
3,938,349.80/5,434,788.36 = 2,172,318.09/x - Step 3: Cross multiply
3,938,349.80x = 5,434,788.36 × 2,172,318.09 - Step 4: Simplify right side
3,938,349.80x = 11,806,089,083,336.40 - Step 5: Solve for x
x = 11,806,089,083,336.40/3,938,349.80 - Step 6: Final answer
x = 2,997,724.86
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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.