Finding the Fourth Proportional to 285,969.41, 428,957.42 and 86,291.53
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Solution
The fourth proportional to 285,969.41, 428,957.42 and 86,291.53 is: 129,438.29
Step by Step Solution
- Step 1: Write the proportion equation
285,969.41 : 428,957.42 = 86,291.53 : x - Step 2: Convert to fraction form
285,969.41/428,957.42 = 86,291.53/x - Step 3: Cross multiply
285,969.41x = 428,957.42 × 86,291.53 - Step 4: Simplify right side
285,969.41x = 37,015,391,058.19 - Step 5: Solve for x
x = 37,015,391,058.19/285,969.41 - Step 6: Final answer
x = 129,438.29
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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.