Finding the Fourth Proportional to 1,490,814,977.63, 2,057,416,716.18 and 821,758,515.76
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Solution
The fourth proportional to 1,490,814,977.63, 2,057,416,716.18 and 821,758,515.76 is: 1,134,077,489.40
Step by Step Solution
- Step 1: Write the proportion equation
1,490,814,977.63 : 2,057,416,716.18 = 821,758,515.76 : x - Step 2: Convert to fraction form
1,490,814,977.63/2,057,416,716.18 = 821,758,515.76/x - Step 3: Cross multiply
1,490,814,977.63x = 2,057,416,716.18 × 821,758,515.76 - Step 4: Simplify right side
1,490,814,977.63x = 1,690,699,706,977,602,816 - Step 5: Solve for x
x = 1,690,699,706,977,602,816/1,490,814,977.63 - Step 6: Final answer
x = 1,134,077,489.40
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.