Finding the Fourth Proportional to 830,413,643.20, 1,245,620,464.80 and 485,189,569.60
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Solution
The fourth proportional to 830,413,643.20, 1,245,620,464.80 and 485,189,569.60 is: 727,784,354.40
Step by Step Solution
- Step 1: Write the proportion equation
830,413,643.20 : 1,245,620,464.80 = 485,189,569.60 : x - Step 2: Convert to fraction form
830,413,643.20/1,245,620,464.80 = 485,189,569.60/x - Step 3: Cross multiply
830,413,643.20x = 1,245,620,464.80 × 485,189,569.60 - Step 4: Simplify right side
830,413,643.20x = 604,362,057,201,264,000 - Step 5: Solve for x
x = 604,362,057,201,264,000/830,413,643.20 - Step 6: Final answer
x = 727,784,354.40
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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.