Finding the Fourth Proportional to 1,211,221.80, 1,816,832.70 and 412,237.80
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Solution
The fourth proportional to 1,211,221.80, 1,816,832.70 and 412,237.80 is: 618,356.70
Step by Step Solution
- Step 1: Write the proportion equation
1,211,221.80 : 1,816,832.70 = 412,237.80 : x - Step 2: Convert to fraction form
1,211,221.80/1,816,832.70 = 412,237.80/x - Step 3: Cross multiply
1,211,221.80x = 1,816,832.70 × 412,237.80 - Step 4: Simplify right side
1,211,221.80x = 748,967,115,216.06 - Step 5: Solve for x
x = 748,967,115,216.06/1,211,221.80 - Step 6: Final answer
x = 618,356.70
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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.