Finding the Fourth Proportional to 687,809.40, 1,031,859.90 and 207,997.80
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Solution
The fourth proportional to 687,809.40, 1,031,859.90 and 207,997.80 is: 312,040.79
Step by Step Solution
- Step 1: Write the proportion equation
687,809.40 : 1,031,859.90 = 207,997.80 : x - Step 2: Convert to fraction form
687,809.40/1,031,859.90 = 207,997.80/x - Step 3: Cross multiply
687,809.40x = 1,031,859.90 × 207,997.80 - Step 4: Simplify right side
687,809.40x = 214,624,589,108.22 - Step 5: Solve for x
x = 214,624,589,108.22/687,809.40 - Step 6: Final answer
x = 312,040.79
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.