Finding the Fourth Proportional to 717,813.18, 990,626.31 and 395,523.19
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Solution
The fourth proportional to 717,813.18, 990,626.31 and 395,523.19 is: 545,846.32
Step by Step Solution
- Step 1: Write the proportion equation
717,813.18 : 990,626.31 = 395,523.19 : x - Step 2: Convert to fraction form
717,813.18/990,626.31 = 395,523.19/x - Step 3: Cross multiply
717,813.18x = 990,626.31 × 395,523.19 - Step 4: Simplify right side
717,813.18x = 391,815,678,229.13 - Step 5: Solve for x
x = 391,815,678,229.13/717,813.18 - Step 6: Final answer
x = 545,846.32
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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.