Finding the Fourth Proportional to 1,207,651,976.80, 1,811,477,965.20 and 517,628,982.40
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Solution
The fourth proportional to 1,207,651,976.80, 1,811,477,965.20 and 517,628,982.40 is: 776,443,473.60
Step by Step Solution
- Step 1: Write the proportion equation
1,207,651,976.80 : 1,811,477,965.20 = 517,628,982.40 : x - Step 2: Convert to fraction form
1,207,651,976.80/1,811,477,965.20 = 517,628,982.40/x - Step 3: Cross multiply
1,207,651,976.80x = 1,811,477,965.20 × 517,628,982.40 - Step 4: Simplify right side
1,207,651,976.80x = 937,673,495,766,498,560 - Step 5: Solve for x
x = 937,673,495,766,498,560/1,207,651,976.80 - Step 6: Final answer
x = 776,443,473.60
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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.