Finding the Fourth Proportional to 656,891.12, 906,521.55 and 385,036.09
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Solution
The fourth proportional to 656,891.12, 906,521.55 and 385,036.09 is: 531,356.72
Step by Step Solution
- Step 1: Write the proportion equation
656,891.12 : 906,521.55 = 385,036.09 : x - Step 2: Convert to fraction form
656,891.12/906,521.55 = 385,036.09/x - Step 3: Cross multiply
656,891.12x = 906,521.55 × 385,036.09 - Step 4: Simplify right side
656,891.12x = 349,043,510,846.44 - Step 5: Solve for x
x = 349,043,510,846.44/656,891.12 - Step 6: Final answer
x = 531,356.72
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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.