Finding the Fourth Proportional to 427,725.88, 641,589.20 and 128,237.92
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Solution
The fourth proportional to 427,725.88, 641,589.20 and 128,237.92 is: 192,356.99
Step by Step Solution
- Step 1: Write the proportion equation
427,725.88 : 641,589.20 = 128,237.92 : x - Step 2: Convert to fraction form
427,725.88/641,589.20 = 128,237.92/x - Step 3: Cross multiply
427,725.88x = 641,589.20 × 128,237.92 - Step 4: Simplify right side
427,725.88x = 82,276,064,502.46 - Step 5: Solve for x
x = 82,276,064,502.46/427,725.88 - Step 6: Final answer
x = 192,356.99
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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.