Finding the Fourth Proportional to 1,320,341,714.70, 1,980,512,572.05 and 861,176,690.70
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Solution
The fourth proportional to 1,320,341,714.70, 1,980,512,572.05 and 861,176,690.70 is: 1,291,765,036.05
Step by Step Solution
- Step 1: Write the proportion equation
1,320,341,714.70 : 1,980,512,572.05 = 861,176,690.70 : x - Step 2: Convert to fraction form
1,320,341,714.70/1,980,512,572.05 = 861,176,690.70/x - Step 3: Cross multiply
1,320,341,714.70x = 1,980,512,572.05 × 861,176,690.70 - Step 4: Simplify right side
1,320,341,714.70x = 1,705,571,262,687,764,480 - Step 5: Solve for x
x = 1,705,571,262,687,764,480/1,320,341,714.70 - Step 6: Final answer
x = 1,291,765,036.05
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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.