Finding the Fourth Proportional to 409,440.20, 614,246.70 and 128,985.80
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Solution
The fourth proportional to 409,440.20, 614,246.70 and 128,985.80 is: 193,505.92
Step by Step Solution
- Step 1: Write the proportion equation
409,440.20 : 614,246.70 = 128,985.80 : x - Step 2: Convert to fraction form
409,440.20/614,246.70 = 128,985.80/x - Step 3: Cross multiply
409,440.20x = 614,246.70 × 128,985.80 - Step 4: Simplify right side
409,440.20x = 79,229,101,996.86 - Step 5: Solve for x
x = 79,229,101,996.86/409,440.20 - Step 6: Final answer
x = 193,505.92
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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.