Finding the Fourth Proportional to 408,937.80, 613,406.70 and 209,191.80
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Solution
The fourth proportional to 408,937.80, 613,406.70 and 209,191.80 is: 313,787.70
Step by Step Solution
- Step 1: Write the proportion equation
408,937.80 : 613,406.70 = 209,191.80 : x - Step 2: Convert to fraction form
408,937.80/613,406.70 = 209,191.80/x - Step 3: Cross multiply
408,937.80x = 613,406.70 × 209,191.80 - Step 4: Simplify right side
408,937.80x = 128,319,651,705.06 - Step 5: Solve for x
x = 128,319,651,705.06/408,937.80 - Step 6: Final answer
x = 313,787.70
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1.5x scale
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.