Finding the Fourth Proportional to 1,390,722,088,243.20, 2,086,083,132,364.80 and 721,259,483,251.20
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Solution
The fourth proportional to 1,390,722,088,243.20, 2,086,083,132,364.80 and 721,259,483,251.20 is: 1,081,889,224,876.80
Step by Step Solution
- Step 1: Write the proportion equation
1,390,722,088,243.20 : 2,086,083,132,364.80 = 721,259,483,251.20 : x - Step 2: Convert to fraction form
1,390,722,088,243.20/2,086,083,132,364.80 = 721,259,483,251.20/x - Step 3: Cross multiply
1,390,722,088,243.20x = 2,086,083,132,364.80 × 721,259,483,251.20 - Step 4: Simplify right side
1,390,722,088,243.20x = 1,504,607,242,068,480,204,210,176 - Step 5: Solve for x
x = 1,504,607,242,068,480,204,210,176/1,390,722,088,243.20 - Step 6: Final answer
x = 1,081,889,224,876.80
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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.