Finding the Fourth Proportional to 408,742.38, 613,212.05 and 128,259.63
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Solution
The fourth proportional to 408,742.38, 613,212.05 and 128,259.63 is: 192,420.35
Step by Step Solution
- Step 1: Write the proportion equation
408,742.38 : 613,212.05 = 128,259.63 : x - Step 2: Convert to fraction form
408,742.38/613,212.05 = 128,259.63/x - Step 3: Cross multiply
408,742.38x = 613,212.05 × 128,259.63 - Step 4: Simplify right side
408,742.38x = 78,650,350,644.54 - Step 5: Solve for x
x = 78,650,350,644.54/408,742.38 - Step 6: Final answer
x = 192,420.35
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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.