Finding the Fourth Proportional to 1,221,736,206.40, 1,832,604,309.60 and 445,407,193.60
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Solution
The fourth proportional to 1,221,736,206.40, 1,832,604,309.60 and 445,407,193.60 is: 668,110,790.40
Step by Step Solution
- Step 1: Write the proportion equation
1,221,736,206.40 : 1,832,604,309.60 = 445,407,193.60 : x - Step 2: Convert to fraction form
1,221,736,206.40/1,832,604,309.60 = 445,407,193.60/x - Step 3: Cross multiply
1,221,736,206.40x = 1,832,604,309.60 × 445,407,193.60 - Step 4: Simplify right side
1,221,736,206.40x = 816,255,142,518,201,600 - Step 5: Solve for x
x = 816,255,142,518,201,600/1,221,736,206.40 - Step 6: Final answer
x = 668,110,790.40
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Similar ratio
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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.