Finding the Fourth Proportional to 409,621.20, 614,431.80 and 129,166.80
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Solution
The fourth proportional to 409,621.20, 614,431.80 and 129,166.80 is: 193,750.20
Step by Step Solution
- Step 1: Write the proportion equation
409,621.20 : 614,431.80 = 129,166.80 : x - Step 2: Convert to fraction form
409,621.20/614,431.80 = 129,166.80/x - Step 3: Cross multiply
409,621.20x = 614,431.80 × 129,166.80 - Step 4: Simplify right side
409,621.20x = 79,364,189,424.24 - Step 5: Solve for x
x = 79,364,189,424.24/409,621.20 - Step 6: Final answer
x = 193,750.20
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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.