Finding the Fourth Proportional to 485,742.80, 727,447.80 and 392,430.80
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Solution
The fourth proportional to 485,742.80, 727,447.80 and 392,430.80 is: 587,703.87
Step by Step Solution
- Step 1: Write the proportion equation
485,742.80 : 727,447.80 = 392,430.80 : x - Step 2: Convert to fraction form
485,742.80/727,447.80 = 392,430.80/x - Step 3: Cross multiply
485,742.80x = 727,447.80 × 392,430.80 - Step 4: Simplify right side
485,742.80x = 285,472,922,112.24 - Step 5: Solve for x
x = 285,472,922,112.24/485,742.80 - Step 6: Final answer
x = 587,703.87
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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.