Finding the Fourth Proportional to 285,938.97, 428,911.54 and 86,261.09
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Solution
The fourth proportional to 285,938.97, 428,911.54 and 86,261.09 is: 129,392.56
Step by Step Solution
- Step 1: Write the proportion equation
285,938.97 : 428,911.54 = 86,261.09 : x - Step 2: Convert to fraction form
285,938.97/428,911.54 = 86,261.09/x - Step 3: Cross multiply
285,938.97x = 428,911.54 × 86,261.09 - Step 4: Simplify right side
285,938.97x = 36,998,374,378.12 - Step 5: Solve for x
x = 36,998,374,378.12/285,938.97 - Step 6: Final answer
x = 129,392.56
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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.