Finding the Fourth Proportional to 831,619.20, 1,240,896.80 and 780,836.80
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Solution
The fourth proportional to 831,619.20, 1,240,896.80 and 780,836.80 is: 1,165,122.07
Step by Step Solution
- Step 1: Write the proportion equation
831,619.20 : 1,240,896.80 = 780,836.80 : x - Step 2: Convert to fraction form
831,619.20/1,240,896.80 = 780,836.80/x - Step 3: Cross multiply
831,619.20x = 1,240,896.80 × 780,836.80 - Step 4: Simplify right side
831,619.20x = 968,937,886,442.24 - Step 5: Solve for x
x = 968,937,886,442.24/831,619.20 - Step 6: Final answer
x = 1,165,122.07
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.