Finding the Fourth Proportional to 402,708.28, 555,743.82 and 221,428.12
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Solution
The fourth proportional to 402,708.28, 555,743.82 and 221,428.12 is: 305,574.32
Step by Step Solution
- Step 1: Write the proportion equation
402,708.28 : 555,743.82 = 221,428.12 : x - Step 2: Convert to fraction form
402,708.28/555,743.82 = 221,428.12/x - Step 3: Cross multiply
402,708.28x = 555,743.82 × 221,428.12 - Step 4: Simplify right side
402,708.28x = 123,057,309,264.22 - Step 5: Solve for x
x = 123,057,309,264.22/402,708.28 - Step 6: Final answer
x = 305,574.32
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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.