Finding the Fourth Proportional to 839,809,687.80, 1,259,714,531.70 and 409,827,991.80
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Solution
The fourth proportional to 839,809,687.80, 1,259,714,531.70 and 409,827,991.80 is: 614,741,987.70
Step by Step Solution
- Step 1: Write the proportion equation
839,809,687.80 : 1,259,714,531.70 = 409,827,991.80 : x - Step 2: Convert to fraction form
839,809,687.80/1,259,714,531.70 = 409,827,991.80/x - Step 3: Cross multiply
839,809,687.80x = 1,259,714,531.70 × 409,827,991.80 - Step 4: Simplify right side
839,809,687.80x = 516,266,276,767,888,448 - Step 5: Solve for x
x = 516,266,276,767,888,448/839,809,687.80 - Step 6: Final answer
x = 614,741,987.70
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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.