Finding the Fourth Proportional to 512,438.20, 768,657.30 and 483,407.80
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Solution
The fourth proportional to 512,438.20, 768,657.30 and 483,407.80 is: 725,111.70
Step by Step Solution
- Step 1: Write the proportion equation
512,438.20 : 768,657.30 = 483,407.80 : x - Step 2: Convert to fraction form
512,438.20/768,657.30 = 483,407.80/x - Step 3: Cross multiply
512,438.20x = 768,657.30 × 483,407.80 - Step 4: Simplify right side
512,438.20x = 371,574,934,346.94 - Step 5: Solve for x
x = 371,574,934,346.94/512,438.20 - Step 6: Final answer
x = 725,111.70
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Double scale
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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.