Finding the Fourth Proportional to 278,857.62, 417,943.80 and 128,895.03
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Solution
The fourth proportional to 278,857.62, 417,943.80 and 128,895.03 is: 193,184.17
Step by Step Solution
- Step 1: Write the proportion equation
278,857.62 : 417,943.80 = 128,895.03 : x - Step 2: Convert to fraction form
278,857.62/417,943.80 = 128,895.03/x - Step 3: Cross multiply
278,857.62x = 417,943.80 × 128,895.03 - Step 4: Simplify right side
278,857.62x = 53,870,878,639.31 - Step 5: Solve for x
x = 53,870,878,639.31/278,857.62 - Step 6: Final answer
x = 193,184.17
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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.