Finding the Fourth Proportional to 717,447.07, 990,121.87 and 395,157.04
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Solution
The fourth proportional to 717,447.07, 990,121.87 and 395,157.04 is: 545,341.45
Step by Step Solution
- Step 1: Write the proportion equation
717,447.07 : 990,121.87 = 395,157.04 : x - Step 2: Convert to fraction form
717,447.07/990,121.87 = 395,157.04/x - Step 3: Cross multiply
717,447.07x = 990,121.87 × 395,157.04 - Step 4: Simplify right side
717,447.07x = 391,253,627,388.47 - Step 5: Solve for x
x = 391,253,627,388.47/717,447.07 - Step 6: Final answer
x = 545,341.45
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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.