Finding the Fourth Proportional to 428,793.21, 643,282.70 and 129,248.73
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Solution
The fourth proportional to 428,793.21, 643,282.70 and 129,248.73 is: 193,901.09
Step by Step Solution
- Step 1: Write the proportion equation
428,793.21 : 643,282.70 = 129,248.73 : x - Step 2: Convert to fraction form
428,793.21/643,282.70 = 129,248.73/x - Step 3: Cross multiply
428,793.21x = 643,282.70 × 129,248.73 - Step 4: Simplify right side
428,793.21x = 83,143,471,359.73 - Step 5: Solve for x
x = 83,143,471,359.73/428,793.21 - Step 6: Final answer
x = 193,901.09
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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.