Finding the Fourth Proportional to 409,615.20, 614,422.80 and 129,160.80
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Solution
The fourth proportional to 409,615.20, 614,422.80 and 129,160.80 is: 193,741.20
Step by Step Solution
- Step 1: Write the proportion equation
409,615.20 : 614,422.80 = 129,160.80 : x - Step 2: Convert to fraction form
409,615.20/614,422.80 = 129,160.80/x - Step 3: Cross multiply
409,615.20x = 614,422.80 × 129,160.80 - Step 4: Simplify right side
409,615.20x = 79,359,340,386.24 - Step 5: Solve for x
x = 79,359,340,386.24/409,615.20 - Step 6: Final answer
x = 193,741.20
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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.