Finding the Fourth Proportional to 208,886.96, 313,319.40 and 128,940.08
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Solution
The fourth proportional to 208,886.96, 313,319.40 and 128,940.08 is: 193,403.31
Step by Step Solution
- Step 1: Write the proportion equation
208,886.96 : 313,319.40 = 128,940.08 : x - Step 2: Convert to fraction form
208,886.96/313,319.40 = 128,940.08/x - Step 3: Cross multiply
208,886.96x = 313,319.40 × 128,940.08 - Step 4: Simplify right side
208,886.96x = 40,399,428,501.55 - Step 5: Solve for x
x = 40,399,428,501.55/208,886.96 - Step 6: Final answer
x = 193,403.31
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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.