Finding the Fourth Proportional to 992,489,331.40, 1,489,052,861.70 and 665,334,251.80
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Solution
The fourth proportional to 992,489,331.40, 1,489,052,861.70 and 665,334,251.80 is: 998,215,134.70
Step by Step Solution
- Step 1: Write the proportion equation
992,489,331.40 : 1,489,052,861.70 = 665,334,251.80 : x - Step 2: Convert to fraction form
992,489,331.40/1,489,052,861.70 = 665,334,251.80/x - Step 3: Cross multiply
992,489,331.40x = 1,489,052,861.70 × 665,334,251.80 - Step 4: Simplify right side
992,489,331.40x = 990,717,871,629,818,368 - Step 5: Solve for x
x = 990,717,871,629,818,368/992,489,331.40 - Step 6: Final answer
x = 998,215,134.70
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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.