Finding the Fourth Proportional to 687,723.60, 1,031,585.40 and 214,405.20
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Solution
The fourth proportional to 687,723.60, 1,031,585.40 and 214,405.20 is: 321,607.80
Step by Step Solution
- Step 1: Write the proportion equation
687,723.60 : 1,031,585.40 = 214,405.20 : x - Step 2: Convert to fraction form
687,723.60/1,031,585.40 = 214,405.20/x - Step 3: Cross multiply
687,723.60x = 1,031,585.40 × 214,405.20 - Step 4: Simplify right side
687,723.60x = 221,177,274,004.08 - Step 5: Solve for x
x = 221,177,274,004.08/687,723.60 - Step 6: Final answer
x = 321,607.80
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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.