Finding the Fourth Proportional to 485,155,287.60, 727,827,409.80 and 140,120,170.80
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Solution
The fourth proportional to 485,155,287.60, 727,827,409.80 and 140,120,170.80 is: 210,207,542.99
Step by Step Solution
- Step 1: Write the proportion equation
485,155,287.60 : 727,827,409.80 = 140,120,170.80 : x - Step 2: Convert to fraction form
485,155,287.60/727,827,409.80 = 140,120,170.80/x - Step 3: Cross multiply
485,155,287.60x = 727,827,409.80 × 140,120,170.80 - Step 4: Simplify right side
485,155,287.60x = 101,983,300,974,097,600 - Step 5: Solve for x
x = 101,983,300,974,097,600/485,155,287.60 - Step 6: Final answer
x = 210,207,542.99
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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.