Finding the Fourth Proportional to 402,718.14, 555,736.80 and 221,428.80
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Solution
The fourth proportional to 402,718.14, 555,736.80 and 221,428.80 is: 305,563.92
Step by Step Solution
- Step 1: Write the proportion equation
402,718.14 : 555,736.80 = 221,428.80 : x - Step 2: Convert to fraction form
402,718.14/555,736.80 = 221,428.80/x - Step 3: Cross multiply
402,718.14x = 555,736.80 × 221,428.80 - Step 4: Simplify right side
402,718.14x = 123,056,132,739.84 - Step 5: Solve for x
x = 123,056,132,739.84/402,718.14 - Step 6: Final answer
x = 305,563.92
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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.