Finding the Fourth Proportional to 639,821,638.80, 959,732,458.20 and 589,433,158.80
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Solution
The fourth proportional to 639,821,638.80, 959,732,458.20 and 589,433,158.80 is: 884,149,738.20
Step by Step Solution
- Step 1: Write the proportion equation
639,821,638.80 : 959,732,458.20 = 589,433,158.80 : x - Step 2: Convert to fraction form
639,821,638.80/959,732,458.20 = 589,433,158.80/x - Step 3: Cross multiply
639,821,638.80x = 959,732,458.20 × 589,433,158.80 - Step 4: Simplify right side
639,821,638.80x = 565,698,134,439,714,944 - Step 5: Solve for x
x = 565,698,134,439,714,944/639,821,638.80 - Step 6: Final answer
x = 884,149,738.20
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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.