Finding the Fourth Proportional to 381,133.87, 571,787.05 and 128,407.48
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Solution
The fourth proportional to 381,133.87, 571,787.05 and 128,407.48 is: 192,640.28
Step by Step Solution
- Step 1: Write the proportion equation
381,133.87 : 571,787.05 = 128,407.48 : x - Step 2: Convert to fraction form
381,133.87/571,787.05 = 128,407.48/x - Step 3: Cross multiply
381,133.87x = 571,787.05 × 128,407.48 - Step 4: Simplify right side
381,133.87x = 73,421,736,295.75 - Step 5: Solve for x
x = 73,421,736,295.75/381,133.87 - Step 6: Final answer
x = 192,640.28
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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.