Finding the Fourth Proportional to 520,905.80, 781,358.70 and 126,921.80
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Solution
The fourth proportional to 520,905.80, 781,358.70 and 126,921.80 is: 190,382.70
Step by Step Solution
- Step 1: Write the proportion equation
520,905.80 : 781,358.70 = 126,921.80 : x - Step 2: Convert to fraction form
520,905.80/781,358.70 = 126,921.80/x - Step 3: Cross multiply
520,905.80x = 781,358.70 × 126,921.80 - Step 4: Simplify right side
520,905.80x = 99,171,452,649.66 - Step 5: Solve for x
x = 99,171,452,649.66/520,905.80 - Step 6: Final answer
x = 190,382.70
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Similar ratio
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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.