Finding the Fourth Proportional to 641,964.21, 885,899.67 and 355,478.13
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Solution
The fourth proportional to 641,964.21, 885,899.67 and 355,478.13 is: 490,553.76
Step by Step Solution
- Step 1: Write the proportion equation
641,964.21 : 885,899.67 = 355,478.13 : x - Step 2: Convert to fraction form
641,964.21/885,899.67 = 355,478.13/x - Step 3: Cross multiply
641,964.21x = 885,899.67 × 355,478.13 - Step 4: Simplify right side
641,964.21x = 314,917,958,059.22 - Step 5: Solve for x
x = 314,917,958,059.22/641,964.21 - Step 6: Final answer
x = 490,553.76
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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.