Finding the Fourth Proportional to 1,189,503.15, 1,641,515.99 and 645,639.05
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Solution
The fourth proportional to 1,189,503.15, 1,641,515.99 and 645,639.05 is: 890,982.77
Step by Step Solution
- Step 1: Write the proportion equation
1,189,503.15 : 1,641,515.99 = 645,639.05 : x - Step 2: Convert to fraction form
1,189,503.15/1,641,515.99 = 645,639.05/x - Step 3: Cross multiply
1,189,503.15x = 1,641,515.99 × 645,639.05 - Step 4: Simplify right side
1,189,503.15x = 1,059,826,812,907.63 - Step 5: Solve for x
x = 1,059,826,812,907.63/1,189,503.15 - Step 6: Final answer
x = 890,982.77
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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.