Finding the Fourth Proportional to 1,405,861.20, 2,103,876.60 and 1,287,896.40
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Solution
The fourth proportional to 1,405,861.20, 2,103,876.60 and 1,287,896.40 is: 1,927,341.83
Step by Step Solution
- Step 1: Write the proportion equation
1,405,861.20 : 2,103,876.60 = 1,287,896.40 : x - Step 2: Convert to fraction form
1,405,861.20/2,103,876.60 = 1,287,896.40/x - Step 3: Cross multiply
1,405,861.20x = 2,103,876.60 × 1,287,896.40 - Step 4: Simplify right side
1,405,861.20x = 2,709,575,099,184.24 - Step 5: Solve for x
x = 2,709,575,099,184.24/1,405,861.20 - Step 6: Final answer
x = 1,927,341.83
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.