Finding the Fourth Proportional to 408,947.80, 613,421.70 and 209,201.80
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Solution
The fourth proportional to 408,947.80, 613,421.70 and 209,201.80 is: 313,802.70
Step by Step Solution
- Step 1: Write the proportion equation
408,947.80 : 613,421.70 = 209,201.80 : x - Step 2: Convert to fraction form
408,947.80/613,421.70 = 209,201.80/x - Step 3: Cross multiply
408,947.80x = 613,421.70 × 209,201.80 - Step 4: Simplify right side
408,947.80x = 128,328,923,799.06 - Step 5: Solve for x
x = 128,328,923,799.06/408,947.80 - Step 6: Final answer
x = 313,802.70
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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.