Finding the Fourth Proportional to 991,890.99, 1,367,542.53 and 642,414.06
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Solution
The fourth proportional to 991,890.99, 1,367,542.53 and 642,414.06 is: 885,710.79
Step by Step Solution
- Step 1: Write the proportion equation
991,890.99 : 1,367,542.53 = 642,414.06 : x - Step 2: Convert to fraction form
991,890.99/1,367,542.53 = 642,414.06/x - Step 3: Cross multiply
991,890.99x = 1,367,542.53 × 642,414.06 - Step 4: Simplify right side
991,890.99x = 878,528,548,919.97 - Step 5: Solve for x
x = 878,528,548,919.97/991,890.99 - Step 6: Final answer
x = 885,710.79
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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.