Finding the Fourth Proportional to 328,531.05, 492,432.08 and 128,785.05
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Solution
The fourth proportional to 328,531.05, 492,432.08 and 128,785.05 is: 193,034.69
Step by Step Solution
- Step 1: Write the proportion equation
328,531.05 : 492,432.08 = 128,785.05 : x - Step 2: Convert to fraction form
328,531.05/492,432.08 = 128,785.05/x - Step 3: Cross multiply
328,531.05x = 492,432.08 × 128,785.05 - Step 4: Simplify right side
328,531.05x = 63,417,889,400.48 - Step 5: Solve for x
x = 63,417,889,400.48/328,531.05 - Step 6: Final answer
x = 193,034.69
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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.