Finding the Fourth Proportional to 811,701.16, 1,119,893.70 and 489,509.80
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Solution
The fourth proportional to 811,701.16, 1,119,893.70 and 489,509.80 is: 675,370.40
Step by Step Solution
- Step 1: Write the proportion equation
811,701.16 : 1,119,893.70 = 489,509.80 : x - Step 2: Convert to fraction form
811,701.16/1,119,893.70 = 489,509.80/x - Step 3: Cross multiply
811,701.16x = 1,119,893.70 × 489,509.80 - Step 4: Simplify right side
811,701.16x = 548,198,941,108.26 - Step 5: Solve for x
x = 548,198,941,108.26/811,701.16 - Step 6: Final answer
x = 675,370.40
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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.