Finding the Fourth Proportional to 845,471,995.20, 1,268,207,992.80 and 386,306,971.20
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Solution
The fourth proportional to 845,471,995.20, 1,268,207,992.80 and 386,306,971.20 is: 579,460,456.80
Step by Step Solution
- Step 1: Write the proportion equation
845,471,995.20 : 1,268,207,992.80 = 386,306,971.20 : x - Step 2: Convert to fraction form
845,471,995.20/1,268,207,992.80 = 386,306,971.20/x - Step 3: Cross multiply
845,471,995.20x = 1,268,207,992.80 × 386,306,971.20 - Step 4: Simplify right side
845,471,995.20x = 489,917,588,550,199,360 - Step 5: Solve for x
x = 489,917,588,550,199,360/845,471,995.20 - Step 6: Final answer
x = 579,460,456.80
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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.