Finding the Fourth Proportional to 720,981,044.70, 1,081,471,567.05 and 478,643,948.70
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Solution
The fourth proportional to 720,981,044.70, 1,081,471,567.05 and 478,643,948.70 is: 717,965,923.05
Step by Step Solution
- Step 1: Write the proportion equation
720,981,044.70 : 1,081,471,567.05 = 478,643,948.70 : x - Step 2: Convert to fraction form
720,981,044.70/1,081,471,567.05 = 478,643,948.70/x - Step 3: Cross multiply
720,981,044.70x = 1,081,471,567.05 × 478,643,948.70 - Step 4: Simplify right side
720,981,044.70x = 517,639,821,259,588,800 - Step 5: Solve for x
x = 517,639,821,259,588,800/720,981,044.70 - Step 6: Final answer
x = 717,965,923.05
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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.