Finding the Fourth Proportional to 1,490,814,980.13, 2,057,416,719.63 and 821,758,518.26
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Solution
The fourth proportional to 1,490,814,980.13, 2,057,416,719.63 and 821,758,518.26 is: 1,134,077,492.85
Step by Step Solution
- Step 1: Write the proportion equation
1,490,814,980.13 : 2,057,416,719.63 = 821,758,518.26 : x - Step 2: Convert to fraction form
1,490,814,980.13/2,057,416,719.63 = 821,758,518.26/x - Step 3: Cross multiply
1,490,814,980.13x = 2,057,416,719.63 × 821,758,518.26 - Step 4: Simplify right side
1,490,814,980.13x = 1,690,699,714,966,498,816 - Step 5: Solve for x
x = 1,690,699,714,966,498,816/1,490,814,980.13 - Step 6: Final answer
x = 1,134,077,492.85
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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.