Finding the Fourth Proportional to 831,362.79, 1,147,280.99 and 449,389.57
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Solution
The fourth proportional to 831,362.79, 1,147,280.99 and 449,389.57 is: 620,157.79
Step by Step Solution
- Step 1: Write the proportion equation
831,362.79 : 1,147,280.99 = 449,389.57 : x - Step 2: Convert to fraction form
831,362.79/1,147,280.99 = 449,389.57/x - Step 3: Cross multiply
831,362.79x = 1,147,280.99 × 449,389.57 - Step 4: Simplify right side
831,362.79x = 515,576,110,765.27 - Step 5: Solve for x
x = 515,576,110,765.27/831,362.79 - Step 6: Final answer
x = 620,157.79
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.