Finding the Fourth Proportional to 390,193.20, 585,623.12 and 278,147.52
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Solution
The fourth proportional to 390,193.20, 585,623.12 and 278,147.52 is: 417,458.88
Step by Step Solution
- Step 1: Write the proportion equation
390,193.20 : 585,623.12 = 278,147.52 : x - Step 2: Convert to fraction form
390,193.20/585,623.12 = 278,147.52/x - Step 3: Cross multiply
390,193.20x = 585,623.12 × 278,147.52 - Step 4: Simplify right side
390,193.20x = 162,889,617,091.93 - Step 5: Solve for x
x = 162,889,617,091.93/390,193.20 - Step 6: Final answer
x = 417,458.88
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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.