Finding the Fourth Proportional to 991,422.84, 1,368,174.24 and 538,713.84
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Solution
The fourth proportional to 991,422.84, 1,368,174.24 and 538,713.84 is: 743,430.92
Step by Step Solution
- Step 1: Write the proportion equation
991,422.84 : 1,368,174.24 = 538,713.84 : x - Step 2: Convert to fraction form
991,422.84/1,368,174.24 = 538,713.84/x - Step 3: Cross multiply
991,422.84x = 1,368,174.24 × 538,713.84 - Step 4: Simplify right side
991,422.84x = 737,054,398,619.48 - Step 5: Solve for x
x = 737,054,398,619.48/991,422.84 - Step 6: Final answer
x = 743,430.92
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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.