Finding the Fourth Proportional to 427,335.69, 640,022.09 and 213,447.09
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Solution
The fourth proportional to 427,335.69, 640,022.09 and 213,447.09 is: 319,680.42
Step by Step Solution
- Step 1: Write the proportion equation
427,335.69 : 640,022.09 = 213,447.09 : x - Step 2: Convert to fraction form
427,335.69/640,022.09 = 213,447.09/x - Step 3: Cross multiply
427,335.69x = 640,022.09 × 213,447.09 - Step 4: Simplify right side
427,335.69x = 136,610,851,578.98 - Step 5: Solve for x
x = 136,610,851,578.98/427,335.69 - Step 6: Final answer
x = 319,680.42
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1.5x scale
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.