Finding the Fourth Proportional to 1,187,934.15, 1,639,361.31 and 644,070.99
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Solution
The fourth proportional to 1,187,934.15, 1,639,361.31 and 644,070.99 is: 888,824.57
Step by Step Solution
- Step 1: Write the proportion equation
1,187,934.15 : 1,639,361.31 = 644,070.99 : x - Step 2: Convert to fraction form
1,187,934.15/1,639,361.31 = 644,070.99/x - Step 3: Cross multiply
1,187,934.15x = 1,639,361.31 × 644,070.99 - Step 4: Simplify right side
1,187,934.15x = 1,055,865,061,899.40 - Step 5: Solve for x
x = 1,055,865,061,899.40/1,187,934.15 - Step 6: Final answer
x = 888,824.57
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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.