Finding the Fourth Proportional to 728,638.61, 1,092,970.67 and 279,385.07
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Solution
The fourth proportional to 728,638.61, 1,092,970.67 and 279,385.07 is: 419,082.49
Step by Step Solution
- Step 1: Write the proportion equation
728,638.61 : 1,092,970.67 = 279,385.07 : x - Step 2: Convert to fraction form
728,638.61/1,092,970.67 = 279,385.07/x - Step 3: Cross multiply
728,638.61x = 1,092,970.67 × 279,385.07 - Step 4: Simplify right side
728,638.61x = 305,359,680,284.12 - Step 5: Solve for x
x = 305,359,680,284.12/728,638.61 - Step 6: Final answer
x = 419,082.49
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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.