Finding the Fourth Proportional to 386,415.74, 579,790.47 and 209,047.70
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Solution
The fourth proportional to 386,415.74, 579,790.47 and 209,047.70 is: 313,661.82
Step by Step Solution
- Step 1: Write the proportion equation
386,415.74 : 579,790.47 = 209,047.70 : x - Step 2: Convert to fraction form
386,415.74/579,790.47 = 209,047.70/x - Step 3: Cross multiply
386,415.74x = 579,790.47 × 209,047.70 - Step 4: Simplify right side
386,415.74x = 121,203,864,235.42 - Step 5: Solve for x
x = 121,203,864,235.42/386,415.74 - Step 6: Final answer
x = 313,661.82
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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.