Finding the Fourth Proportional to 1,290,644.79, 1,781,091.29 and 717,672.66
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Solution
The fourth proportional to 1,290,644.79, 1,781,091.29 and 717,672.66 is: 990,389.09
Step by Step Solution
- Step 1: Write the proportion equation
1,290,644.79 : 1,781,091.29 = 717,672.66 : x - Step 2: Convert to fraction form
1,290,644.79/1,781,091.29 = 717,672.66/x - Step 3: Cross multiply
1,290,644.79x = 1,781,091.29 × 717,672.66 - Step 4: Simplify right side
1,290,644.79x = 1,278,240,523,797.13 - Step 5: Solve for x
x = 1,278,240,523,797.13/1,290,644.79 - Step 6: Final answer
x = 990,389.09
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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.