Finding the Fourth Proportional to 714,649.12, 986,243.52 and 392,372.80
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Solution
The fourth proportional to 714,649.12, 986,243.52 and 392,372.80 is: 541,489.69
Step by Step Solution
- Step 1: Write the proportion equation
714,649.12 : 986,243.52 = 392,372.80 : x - Step 2: Convert to fraction form
714,649.12/986,243.52 = 392,372.80/x - Step 3: Cross multiply
714,649.12x = 986,243.52 × 392,372.80 - Step 4: Simplify right side
714,649.12x = 386,975,131,424.26 - Step 5: Solve for x
x = 386,975,131,424.26/714,649.12 - Step 6: Final answer
x = 541,489.69
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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.