Finding the Fourth Proportional to 208,884.96, 313,316.40 and 128,938.08
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Solution
The fourth proportional to 208,884.96, 313,316.40 and 128,938.08 is: 193,400.31
Step by Step Solution
- Step 1: Write the proportion equation
208,884.96 : 313,316.40 = 128,938.08 : x - Step 2: Convert to fraction form
208,884.96/313,316.40 = 128,938.08/x - Step 3: Cross multiply
208,884.96x = 313,316.40 × 128,938.08 - Step 4: Simplify right side
208,884.96x = 40,398,415,048.51 - Step 5: Solve for x
x = 40,398,415,048.51/208,884.96 - Step 6: Final answer
x = 193,400.31
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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.