Finding the Fourth Proportional to 428,192.42, 642,299.09 and 143,887.07
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Solution
The fourth proportional to 428,192.42, 642,299.09 and 143,887.07 is: 215,834.12
Step by Step Solution
- Step 1: Write the proportion equation
428,192.42 : 642,299.09 = 143,887.07 : x - Step 2: Convert to fraction form
428,192.42/642,299.09 = 143,887.07/x - Step 3: Cross multiply
428,192.42x = 642,299.09 × 143,887.07 - Step 4: Simplify right side
428,192.42x = 92,418,535,010.08 - Step 5: Solve for x
x = 92,418,535,010.08/428,192.42 - Step 6: Final answer
x = 215,834.12
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1.5x scale
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.