Finding the Fourth Proportional to 642,471.78, 886,597.84 and 355,989.36
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Solution
The fourth proportional to 642,471.78, 886,597.84 and 355,989.36 is: 491,257.99
Step by Step Solution
- Step 1: Write the proportion equation
642,471.78 : 886,597.84 = 355,989.36 : x - Step 2: Convert to fraction form
642,471.78/886,597.84 = 355,989.36/x - Step 3: Cross multiply
642,471.78x = 886,597.84 × 355,989.36 - Step 4: Simplify right side
642,471.78x = 315,619,395,859.04 - Step 5: Solve for x
x = 315,619,395,859.04/642,471.78 - Step 6: Final answer
x = 491,257.99
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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.