Finding the Fourth Proportional to 428,474.48, 641,807.55 and 343,776.08
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Solution
The fourth proportional to 428,474.48, 641,807.55 and 343,776.08 is: 514,938.68
Step by Step Solution
- Step 1: Write the proportion equation
428,474.48 : 641,807.55 = 343,776.08 : x - Step 2: Convert to fraction form
428,474.48/641,807.55 = 343,776.08/x - Step 3: Cross multiply
428,474.48x = 641,807.55 × 343,776.08 - Step 4: Simplify right side
428,474.48x = 220,638,083,653.40 - Step 5: Solve for x
x = 220,638,083,653.40/428,474.48 - Step 6: Final answer
x = 514,938.68
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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.