Finding the Fourth Proportional to 428,790.73, 642,328.48 and 257,918.09
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Solution
The fourth proportional to 428,790.73, 642,328.48 and 257,918.09 is: 386,361.28
Step by Step Solution
- Step 1: Write the proportion equation
428,790.73 : 642,328.48 = 257,918.09 : x - Step 2: Convert to fraction form
428,790.73/642,328.48 = 257,918.09/x - Step 3: Cross multiply
428,790.73x = 642,328.48 × 257,918.09 - Step 4: Simplify right side
428,790.73x = 165,668,135,438.06 - Step 5: Solve for x
x = 165,668,135,438.06/428,790.73 - Step 6: Final answer
x = 386,361.28
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.