Finding the Fourth Proportional to 280,918.36, 421,389.84 and 81,258.93
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Solution
The fourth proportional to 280,918.36, 421,389.84 and 81,258.93 is: 121,891.95
Step by Step Solution
- Step 1: Write the proportion equation
280,918.36 : 421,389.84 = 81,258.93 : x - Step 2: Convert to fraction form
280,918.36/421,389.84 = 81,258.93/x - Step 3: Cross multiply
280,918.36x = 421,389.84 × 81,258.93 - Step 4: Simplify right side
280,918.36x = 34,241,687,511.27 - Step 5: Solve for x
x = 34,241,687,511.27/280,918.36 - Step 6: Final answer
x = 121,891.95
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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.