Finding the Fourth Proportional to 485,403.70, 669,801.73 and 281,412.09
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Solution
The fourth proportional to 485,403.70, 669,801.73 and 281,412.09 is: 388,316.58
Step by Step Solution
- Step 1: Write the proportion equation
485,403.70 : 669,801.73 = 281,412.09 : x - Step 2: Convert to fraction form
485,403.70/669,801.73 = 281,412.09/x - Step 3: Cross multiply
485,403.70x = 669,801.73 × 281,412.09 - Step 4: Simplify right side
485,403.70x = 188,490,304,724.92 - Step 5: Solve for x
x = 188,490,304,724.92/485,403.70 - Step 6: Final answer
x = 388,316.58
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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.