Finding the Fourth Proportional to 280,573.13, 421,122.14 and 138,578.75
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Solution
The fourth proportional to 280,573.13, 421,122.14 and 138,578.75 is: 207,997.75
Step by Step Solution
- Step 1: Write the proportion equation
280,573.13 : 421,122.14 = 138,578.75 : x - Step 2: Convert to fraction form
280,573.13/421,122.14 = 138,578.75/x - Step 3: Cross multiply
280,573.13x = 421,122.14 × 138,578.75 - Step 4: Simplify right side
280,573.13x = 58,358,579,058.90 - Step 5: Solve for x
x = 58,358,579,058.90/280,573.13 - Step 6: Final answer
x = 207,997.75
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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.