Finding the Fourth Proportional to 3,939,281.07, 5,436,207.87 and 2,128,445.07
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Solution
The fourth proportional to 3,939,281.07, 5,436,207.87 and 2,128,445.07 is: 2,937,254.19
Step by Step Solution
- Step 1: Write the proportion equation
3,939,281.07 : 5,436,207.87 = 2,128,445.07 : x - Step 2: Convert to fraction form
3,939,281.07/5,436,207.87 = 2,128,445.07/x - Step 3: Cross multiply
3,939,281.07x = 5,436,207.87 × 2,128,445.07 - Step 4: Simplify right side
3,939,281.07x = 11,570,669,840,396.70 - Step 5: Solve for x
x = 11,570,669,840,396.70/3,939,281.07 - Step 6: Final answer
x = 2,937,254.19
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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.