Finding the Fourth Proportional to 278,478.75, 417,651.12 and 128,575.02
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Solution
The fourth proportional to 278,478.75, 417,651.12 and 128,575.02 is: 192,831.59
Step by Step Solution
- Step 1: Write the proportion equation
278,478.75 : 417,651.12 = 128,575.02 : x - Step 2: Convert to fraction form
278,478.75/417,651.12 = 128,575.02/x - Step 3: Cross multiply
278,478.75x = 417,651.12 × 128,575.02 - Step 4: Simplify right side
278,478.75x = 53,699,501,107.02 - Step 5: Solve for x
x = 53,699,501,107.02/278,478.75 - Step 6: Final answer
x = 192,831.59
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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.