Finding the Fourth Proportional to 870,081,320.70, 1,305,121,981.05 and 502,245,416.70
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Solution
The fourth proportional to 870,081,320.70, 1,305,121,981.05 and 502,245,416.70 is: 753,368,125.05
Step by Step Solution
- Step 1: Write the proportion equation
870,081,320.70 : 1,305,121,981.05 = 502,245,416.70 : x - Step 2: Convert to fraction form
870,081,320.70/1,305,121,981.05 = 502,245,416.70/x - Step 3: Cross multiply
870,081,320.70x = 1,305,121,981.05 × 502,245,416.70 - Step 4: Simplify right side
870,081,320.70x = 655,491,533,216,786,688 - Step 5: Solve for x
x = 655,491,533,216,786,688/870,081,320.70 - Step 6: Final answer
x = 753,368,125.05
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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.