Finding the Fourth Proportional to 879,138.28, 1,213,218.42 and 476,730.28
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Solution
The fourth proportional to 879,138.28, 1,213,218.42 and 476,730.28 is: 657,891.90
Step by Step Solution
- Step 1: Write the proportion equation
879,138.28 : 1,213,218.42 = 476,730.28 : x - Step 2: Convert to fraction form
879,138.28/1,213,218.42 = 476,730.28/x - Step 3: Cross multiply
879,138.28x = 1,213,218.42 × 476,730.28 - Step 4: Simplify right side
879,138.28x = 578,377,957,067.76 - Step 5: Solve for x
x = 578,377,957,067.76/879,138.28 - Step 6: Final answer
x = 657,891.90
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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.