Finding the Fourth Proportional to 408,908.90, 613,363.35 and 128,425.70
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Solution
The fourth proportional to 408,908.90, 613,363.35 and 128,425.70 is: 192,638.55
Step by Step Solution
- Step 1: Write the proportion equation
408,908.90 : 613,363.35 = 128,425.70 : x - Step 2: Convert to fraction form
408,908.90/613,363.35 = 128,425.70/x - Step 3: Cross multiply
408,908.90x = 613,363.35 × 128,425.70 - Step 4: Simplify right side
408,908.90x = 78,771,617,578.10 - Step 5: Solve for x
x = 78,771,617,578.10/408,908.90 - Step 6: Final answer
x = 192,638.55
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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.