Finding the Fourth Proportional to 717,720.99, 990,454.43 and 395,431.09
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Solution
The fourth proportional to 717,720.99, 990,454.43 and 395,431.09 is: 545,694.60
Step by Step Solution
- Step 1: Write the proportion equation
717,720.99 : 990,454.43 = 395,431.09 : x - Step 2: Convert to fraction form
717,720.99/990,454.43 = 395,431.09/x - Step 3: Cross multiply
717,720.99x = 990,454.43 × 395,431.09 - Step 4: Simplify right side
717,720.99x = 391,656,470,396.94 - Step 5: Solve for x
x = 391,656,470,396.94/717,720.99 - Step 6: Final answer
x = 545,694.60
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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.