Finding the Fourth Proportional to 885,146,918.70, 1,327,720,378.05 and 425,981,894.70
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Solution
The fourth proportional to 885,146,918.70, 1,327,720,378.05 and 425,981,894.70 is: 638,972,842.05
Step by Step Solution
- Step 1: Write the proportion equation
885,146,918.70 : 1,327,720,378.05 = 425,981,894.70 : x - Step 2: Convert to fraction form
885,146,918.70/1,327,720,378.05 = 425,981,894.70/x - Step 3: Cross multiply
885,146,918.70x = 1,327,720,378.05 × 425,981,894.70 - Step 4: Simplify right side
885,146,918.70x = 565,584,842,273,539,264 - Step 5: Solve for x
x = 565,584,842,273,539,264/885,146,918.70 - Step 6: Final answer
x = 638,972,842.05
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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.