Finding the Fourth Proportional to 393,057.97, 542,439.23 and 221,030.08
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Solution
The fourth proportional to 393,057.97, 542,439.23 and 221,030.08 is: 305,032.32
Step by Step Solution
- Step 1: Write the proportion equation
393,057.97 : 542,439.23 = 221,030.08 : x - Step 2: Convert to fraction form
393,057.97/542,439.23 = 221,030.08/x - Step 3: Cross multiply
393,057.97x = 542,439.23 × 221,030.08 - Step 4: Simplify right side
393,057.97x = 119,895,383,940.79 - Step 5: Solve for x
x = 119,895,383,940.79/393,057.97 - Step 6: Final answer
x = 305,032.32
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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.