Finding the Fourth Proportional to 717,913.16, 990,707.42 and 391,229.09
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Solution
The fourth proportional to 717,913.16, 990,707.42 and 391,229.09 is: 539,889.20
Step by Step Solution
- Step 1: Write the proportion equation
717,913.16 : 990,707.42 = 391,229.09 : x - Step 2: Convert to fraction form
717,913.16/990,707.42 = 391,229.09/x - Step 3: Cross multiply
717,913.16x = 990,707.42 × 391,229.09 - Step 4: Simplify right side
717,913.16x = 387,593,562,122.54 - Step 5: Solve for x
x = 387,593,562,122.54/717,913.16 - Step 6: Final answer
x = 539,889.20
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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.