Finding the Fourth Proportional to 431,428.80, 646,989.60 and 194,884.80
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Solution
The fourth proportional to 431,428.80, 646,989.60 and 194,884.80 is: 292,257.82
Step by Step Solution
- Step 1: Write the proportion equation
431,428.80 : 646,989.60 = 194,884.80 : x - Step 2: Convert to fraction form
431,428.80/646,989.60 = 194,884.80/x - Step 3: Cross multiply
431,428.80x = 646,989.60 × 194,884.80 - Step 4: Simplify right side
431,428.80x = 126,088,438,798.08 - Step 5: Solve for x
x = 126,088,438,798.08/431,428.80 - Step 6: Final answer
x = 292,257.82
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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.