Finding the Fourth Proportional to 728,719.81, 1,005,634.68 and 406,450.68
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Solution
The fourth proportional to 728,719.81, 1,005,634.68 and 406,450.68 is: 560,902.68
Step by Step Solution
- Step 1: Write the proportion equation
728,719.81 : 1,005,634.68 = 406,450.68 : x - Step 2: Convert to fraction form
728,719.81/1,005,634.68 = 406,450.68/x - Step 3: Cross multiply
728,719.81x = 1,005,634.68 × 406,450.68 - Step 4: Simplify right side
728,719.81x = 408,740,894,222.26 - Step 5: Solve for x
x = 408,740,894,222.26/728,719.81 - Step 6: Final answer
x = 560,902.68
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.