Finding the Fourth Proportional to 811,973.80, 1,217,960.70 and 438,725.80
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Solution
The fourth proportional to 811,973.80, 1,217,960.70 and 438,725.80 is: 658,088.70
Step by Step Solution
- Step 1: Write the proportion equation
811,973.80 : 1,217,960.70 = 438,725.80 : x - Step 2: Convert to fraction form
811,973.80/1,217,960.70 = 438,725.80/x - Step 3: Cross multiply
811,973.80x = 1,217,960.70 × 438,725.80 - Step 4: Simplify right side
811,973.80x = 534,350,782,476.06 - Step 5: Solve for x
x = 534,350,782,476.06/811,973.80 - Step 6: Final answer
x = 658,088.70
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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.