Finding the Fourth Proportional to 716,121.61, 988,228.09 and 393,831.70
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Solution
The fourth proportional to 716,121.61, 988,228.09 and 393,831.70 is: 543,476.89
Step by Step Solution
- Step 1: Write the proportion equation
716,121.61 : 988,228.09 = 393,831.70 : x - Step 2: Convert to fraction form
716,121.61/988,228.09 = 393,831.70/x - Step 3: Cross multiply
716,121.61x = 988,228.09 × 393,831.70 - Step 4: Simplify right side
716,121.61x = 389,195,546,703.30 - Step 5: Solve for x
x = 389,195,546,703.30/716,121.61 - Step 6: Final answer
x = 543,476.89
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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.