Finding the Fourth Proportional to 259,326.40, 388,960.80 and 212,497.60
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Solution
The fourth proportional to 259,326.40, 388,960.80 and 212,497.60 is: 318,722.80
Step by Step Solution
- Step 1: Write the proportion equation
259,326.40 : 388,960.80 = 212,497.60 : x - Step 2: Convert to fraction form
259,326.40/388,960.80 = 212,497.60/x - Step 3: Cross multiply
259,326.40x = 388,960.80 × 212,497.60 - Step 4: Simplify right side
259,326.40x = 82,653,236,494.08 - Step 5: Solve for x
x = 82,653,236,494.08/259,326.40 - Step 6: Final answer
x = 318,722.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.