Finding the Fourth Proportional to 998,908,801.20, 1,498,363,201.80 and 981,690,112.80
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Solution
The fourth proportional to 998,908,801.20, 1,498,363,201.80 and 981,690,112.80 is: 1,472,535,169.20
Step by Step Solution
- Step 1: Write the proportion equation
998,908,801.20 : 1,498,363,201.80 = 981,690,112.80 : x - Step 2: Convert to fraction form
998,908,801.20/1,498,363,201.80 = 981,690,112.80/x - Step 3: Cross multiply
998,908,801.20x = 1,498,363,201.80 × 981,690,112.80 - Step 4: Simplify right side
998,908,801.20x = 1,470,928,340,590,411,008 - Step 5: Solve for x
x = 1,470,928,340,590,411,008/998,908,801.20 - Step 6: Final answer
x = 1,472,535,169.20
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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.