Finding the Fourth Proportional to 1,329,697,701.20, 1,994,546,551.80 and 409,454,465.60
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Solution
The fourth proportional to 1,329,697,701.20, 1,994,546,551.80 and 409,454,465.60 is: 614,181,698.40
Step by Step Solution
- Step 1: Write the proportion equation
1,329,697,701.20 : 1,994,546,551.80 = 409,454,465.60 : x - Step 2: Convert to fraction form
1,329,697,701.20/1,994,546,551.80 = 409,454,465.60/x - Step 3: Cross multiply
1,329,697,701.20x = 1,994,546,551.80 × 409,454,465.60 - Step 4: Simplify right side
1,329,697,701.20x = 816,675,992,481,591,808 - Step 5: Solve for x
x = 816,675,992,481,591,808/1,329,697,701.20 - Step 6: Final answer
x = 614,181,698.40
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Double scale
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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.