Finding the Fourth Proportional to 1,213,121.80, 1,819,682.70 and 414,137.80
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Solution
The fourth proportional to 1,213,121.80, 1,819,682.70 and 414,137.80 is: 621,206.70
Step by Step Solution
- Step 1: Write the proportion equation
1,213,121.80 : 1,819,682.70 = 414,137.80 : x - Step 2: Convert to fraction form
1,213,121.80/1,819,682.70 = 414,137.80/x - Step 3: Cross multiply
1,213,121.80x = 1,819,682.70 × 414,137.80 - Step 4: Simplify right side
1,213,121.80x = 753,599,390,076.06 - Step 5: Solve for x
x = 753,599,390,076.06/1,213,121.80 - Step 6: Final answer
x = 621,206.70
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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.