Finding the Fourth Proportional to 328,405.68, 492,803.08 and 138,855.70
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Solution
The fourth proportional to 328,405.68, 492,803.08 and 138,855.70 is: 208,365.81
Step by Step Solution
- Step 1: Write the proportion equation
328,405.68 : 492,803.08 = 138,855.70 : x - Step 2: Convert to fraction form
328,405.68/492,803.08 = 138,855.70/x - Step 3: Cross multiply
328,405.68x = 492,803.08 × 138,855.70 - Step 4: Simplify right side
328,405.68x = 68,428,516,635.56 - Step 5: Solve for x
x = 68,428,516,635.56/328,405.68 - Step 6: Final answer
x = 208,365.81
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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.