Finding the Fourth Proportional to 408,887.20, 613,330.80 and 128,432.80
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Solution
The fourth proportional to 408,887.20, 613,330.80 and 128,432.80 is: 192,649.20
Step by Step Solution
- Step 1: Write the proportion equation
408,887.20 : 613,330.80 = 128,432.80 : x - Step 2: Convert to fraction form
408,887.20/613,330.80 = 128,432.80/x - Step 3: Cross multiply
408,887.20x = 613,330.80 × 128,432.80 - Step 4: Simplify right side
408,887.20x = 78,771,791,970.24 - Step 5: Solve for x
x = 78,771,791,970.24/408,887.20 - Step 6: Final answer
x = 192,649.20
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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.