Finding the Fourth Proportional to 2,115,430.21, 2,921,697.30 and 1,425,912.85
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Solution
The fourth proportional to 2,115,430.21, 2,921,697.30 and 1,425,912.85 is: 1,969,379.89
Step by Step Solution
- Step 1: Write the proportion equation
2,115,430.21 : 2,921,697.30 = 1,425,912.85 : x - Step 2: Convert to fraction form
2,115,430.21/2,921,697.30 = 1,425,912.85/x - Step 3: Cross multiply
2,115,430.21x = 2,921,697.30 × 1,425,912.85 - Step 4: Simplify right side
2,115,430.21x = 4,166,085,723,880.31 - Step 5: Solve for x
x = 4,166,085,723,880.31/2,115,430.21 - Step 6: Final answer
x = 1,969,379.89
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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.