Finding the Fourth Proportional to 687,286.80, 1,031,027.40 and 213,922.80
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Solution
The fourth proportional to 687,286.80, 1,031,027.40 and 213,922.80 is: 320,914.45
Step by Step Solution
- Step 1: Write the proportion equation
687,286.80 : 1,031,027.40 = 213,922.80 : x - Step 2: Convert to fraction form
687,286.80/1,031,027.40 = 213,922.80/x - Step 3: Cross multiply
687,286.80x = 1,031,027.40 × 213,922.80 - Step 4: Simplify right side
687,286.80x = 220,560,268,284.72 - Step 5: Solve for x
x = 220,560,268,284.72/687,286.80 - Step 6: Final answer
x = 320,914.45
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1.5x scale
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.