Finding the Fourth Proportional to 321,139.64, 442,161.62 and 272,645.65
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Solution
The fourth proportional to 321,139.64, 442,161.62 and 272,645.65 is: 375,392.59
Step by Step Solution
- Step 1: Write the proportion equation
321,139.64 : 442,161.62 = 272,645.65 : x - Step 2: Convert to fraction form
321,139.64/442,161.62 = 272,645.65/x - Step 3: Cross multiply
321,139.64x = 442,161.62 × 272,645.65 - Step 4: Simplify right side
321,139.64x = 120,553,442,289.95 - Step 5: Solve for x
x = 120,553,442,289.95/321,139.64 - Step 6: Final answer
x = 375,392.59
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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.