Finding the Fourth Proportional to 717,488.68, 990,179.34 and 395,198.68
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Solution
The fourth proportional to 717,488.68, 990,179.34 and 395,198.68 is: 545,398.94
Step by Step Solution
- Step 1: Write the proportion equation
717,488.68 : 990,179.34 = 395,198.68 : x - Step 2: Convert to fraction form
717,488.68/990,179.34 = 395,198.68/x - Step 3: Cross multiply
717,488.68x = 990,179.34 × 395,198.68 - Step 4: Simplify right side
717,488.68x = 391,317,568,131.27 - Step 5: Solve for x
x = 391,317,568,131.27/717,488.68 - Step 6: Final answer
x = 545,398.94
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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.