Finding the Fourth Proportional to 512,487.20, 768,730.80 and 400,512.80
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Solution
The fourth proportional to 512,487.20, 768,730.80 and 400,512.80 is: 600,769.20
Step by Step Solution
- Step 1: Write the proportion equation
512,487.20 : 768,730.80 = 400,512.80 : x - Step 2: Convert to fraction form
512,487.20/768,730.80 = 400,512.80/x - Step 3: Cross multiply
512,487.20x = 768,730.80 × 400,512.80 - Step 4: Simplify right side
512,487.20x = 307,886,525,154.24 - Step 5: Solve for x
x = 307,886,525,154.24/512,487.20 - Step 6: Final answer
x = 600,769.20
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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.