Finding the Fourth Proportional to 639,640.13, 882,717.16 and 353,178.37
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Solution
The fourth proportional to 639,640.13, 882,717.16 and 353,178.37 is: 487,393.75
Step by Step Solution
- Step 1: Write the proportion equation
639,640.13 : 882,717.16 = 353,178.37 : x - Step 2: Convert to fraction form
639,640.13/882,717.16 = 353,178.37/x - Step 3: Cross multiply
639,640.13x = 882,717.16 × 353,178.37 - Step 4: Simplify right side
639,640.13x = 311,756,603,326.24 - Step 5: Solve for x
x = 311,756,603,326.24/639,640.13 - Step 6: Final answer
x = 487,393.75
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1.5x scale
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.