Finding the Fourth Proportional to 305,844.84, 421,919.40 and 215,251.08
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Solution
The fourth proportional to 305,844.84, 421,919.40 and 215,251.08 is: 296,943.40
Step by Step Solution
- Step 1: Write the proportion equation
305,844.84 : 421,919.40 = 215,251.08 : x - Step 2: Convert to fraction form
305,844.84/421,919.40 = 215,251.08/x - Step 3: Cross multiply
305,844.84x = 421,919.40 × 215,251.08 - Step 4: Simplify right side
305,844.84x = 90,818,606,522.95 - Step 5: Solve for x
x = 90,818,606,522.95/305,844.84 - Step 6: Final answer
x = 296,943.40
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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.