Finding the Fourth Proportional to 392,643.12, 589,020.36 and 126,341.76
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Solution
The fourth proportional to 392,643.12, 589,020.36 and 126,341.76 is: 189,530.56
Step by Step Solution
- Step 1: Write the proportion equation
392,643.12 : 589,020.36 = 126,341.76 : x - Step 2: Convert to fraction form
392,643.12/589,020.36 = 126,341.76/x - Step 3: Cross multiply
392,643.12x = 589,020.36 × 126,341.76 - Step 4: Simplify right side
392,643.12x = 74,417,868,958.23 - Step 5: Solve for x
x = 74,417,868,958.23/392,643.12 - Step 6: Final answer
x = 189,530.56
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.