Finding the Fourth Proportional to 715,790.73, 987,810.08 and 393,508.95
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Solution
The fourth proportional to 715,790.73, 987,810.08 and 393,508.95 is: 543,052.72
Step by Step Solution
- Step 1: Write the proportion equation
715,790.73 : 987,810.08 = 393,508.95 : x - Step 2: Convert to fraction form
715,790.73/987,810.08 = 393,508.95/x - Step 3: Cross multiply
715,790.73x = 987,810.08 × 393,508.95 - Step 4: Simplify right side
715,790.73x = 388,712,101,708.38 - Step 5: Solve for x
x = 388,712,101,708.38/715,790.73 - Step 6: Final answer
x = 543,052.72
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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.