Finding the Fourth Proportional to 491,995.64, 678,955.21 and 285,304.09
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Solution
The fourth proportional to 491,995.64, 678,955.21 and 285,304.09 is: 393,720.35
Step by Step Solution
- Step 1: Write the proportion equation
491,995.64 : 678,955.21 = 285,304.09 : x - Step 2: Convert to fraction form
491,995.64/678,955.21 = 285,304.09/x - Step 3: Cross multiply
491,995.64x = 678,955.21 × 285,304.09 - Step 4: Simplify right side
491,995.64x = 193,708,695,929.16 - Step 5: Solve for x
x = 193,708,695,929.16/491,995.64 - Step 6: Final answer
x = 393,720.35
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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.