Finding the Fourth Proportional to 639,640.76, 882,718.02 and 353,178.99
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Solution
The fourth proportional to 639,640.76, 882,718.02 and 353,178.99 is: 487,394.61
Step by Step Solution
- Step 1: Write the proportion equation
639,640.76 : 882,718.02 = 353,178.99 : x - Step 2: Convert to fraction form
639,640.76/882,718.02 = 353,178.99/x - Step 3: Cross multiply
639,640.76x = 882,718.02 × 353,178.99 - Step 4: Simplify right side
639,640.76x = 311,757,458,758.40 - Step 5: Solve for x
x = 311,757,458,758.40/639,640.76 - Step 6: Final answer
x = 487,394.61
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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.