Finding the Fourth Proportional to 718,727.24, 991,826.21 and 396,430.41
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Solution
The fourth proportional to 718,727.24, 991,826.21 and 396,430.41 is: 547,064.38
Step by Step Solution
- Step 1: Write the proportion equation
718,727.24 : 991,826.21 = 396,430.41 : x - Step 2: Convert to fraction form
718,727.24/991,826.21 = 396,430.41/x - Step 3: Cross multiply
718,727.24x = 991,826.21 × 396,430.41 - Step 4: Simplify right side
718,727.24x = 393,190,071,079.05 - Step 5: Solve for x
x = 393,190,071,079.05/718,727.24 - Step 6: Final answer
x = 547,064.38
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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.