Finding the Fourth Proportional to 687,811.20, 1,031,716.80 and 372,883.20
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Solution
The fourth proportional to 687,811.20, 1,031,716.80 and 372,883.20 is: 559,324.80
Step by Step Solution
- Step 1: Write the proportion equation
687,811.20 : 1,031,716.80 = 372,883.20 : x - Step 2: Convert to fraction form
687,811.20/1,031,716.80 = 372,883.20/x - Step 3: Cross multiply
687,811.20x = 1,031,716.80 × 372,883.20 - Step 4: Simplify right side
687,811.20x = 384,709,861,877.76 - Step 5: Solve for x
x = 384,709,861,877.76/687,811.20 - Step 6: Final answer
x = 559,324.80
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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.