Finding the Fourth Proportional to 428,933.07, 643,403.93 and 129,416.13
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Solution
The fourth proportional to 428,933.07, 643,403.93 and 129,416.13 is: 194,125.50
Step by Step Solution
- Step 1: Write the proportion equation
428,933.07 : 643,403.93 = 129,416.13 : x - Step 2: Convert to fraction form
428,933.07/643,403.93 = 129,416.13/x - Step 3: Cross multiply
428,933.07x = 643,403.93 × 129,416.13 - Step 4: Simplify right side
428,933.07x = 83,266,846,000.31 - Step 5: Solve for x
x = 83,266,846,000.31/428,933.07 - Step 6: Final answer
x = 194,125.50
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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.