Finding the Fourth Proportional to 718,321.36, 991,237.80 and 396,013.84
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Solution
The fourth proportional to 718,321.36, 991,237.80 and 396,013.84 is: 546,473.92
Step by Step Solution
- Step 1: Write the proportion equation
718,321.36 : 991,237.80 = 396,013.84 : x - Step 2: Convert to fraction form
718,321.36/991,237.80 = 396,013.84/x - Step 3: Cross multiply
718,321.36x = 991,237.80 × 396,013.84 - Step 4: Simplify right side
718,321.36x = 392,543,887,531.15 - Step 5: Solve for x
x = 392,543,887,531.15/718,321.36 - Step 6: Final answer
x = 546,473.92
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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.