Finding the Fourth Proportional to 991,154,408.80, 1,486,731,613.20 and 829,911,272.80
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Solution
The fourth proportional to 991,154,408.80, 1,486,731,613.20 and 829,911,272.80 is: 1,244,866,909.20
Step by Step Solution
- Step 1: Write the proportion equation
991,154,408.80 : 1,486,731,613.20 = 829,911,272.80 : x - Step 2: Convert to fraction form
991,154,408.80/1,486,731,613.20 = 829,911,272.80/x - Step 3: Cross multiply
991,154,408.80x = 1,486,731,613.20 × 829,911,272.80 - Step 4: Simplify right side
991,154,408.80x = 1,233,855,325,422,809,344 - Step 5: Solve for x
x = 1,233,855,325,422,809,344/991,154,408.80 - Step 6: Final answer
x = 1,244,866,909.20
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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.